diff --git a/.gitignore b/.gitignore
index d1b90137..5dd24e6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -134,4 +134,6 @@ env_variables.sh
 lib/**/*.html
 lib/**/*.css
 
-debug.log
\ No newline at end of file
+debug.log
+
+backups/
\ No newline at end of file
diff --git a/data_base.sqlite b/data_base.sqlite
index 64dbecef..b1b9a4a8 100644
Binary files a/data_base.sqlite and b/data_base.sqlite differ
diff --git a/lib/wekafiles/packages/packages/installedPackageCache.ser b/lib/wekafiles/packages/packages/installedPackageCache.ser
deleted file mode 100644
index 9954e28f..00000000
Binary files a/lib/wekafiles/packages/packages/installedPackageCache.ser and /dev/null differ
diff --git a/migrate.py b/migrate.py
new file mode 100644
index 00000000..dcd7dc3e
--- /dev/null
+++ b/migrate.py
@@ -0,0 +1,214 @@
+# Migrate last database mantaining the users and experiments
+import sqlite3
+from shutil import copyfile
+from datetime import datetime
+import os
+
+current_db_path = './ubumlaas/data.sqlite'
+last_db_path = './data_base.sqlite'
+
+current_db = sqlite3.connect(current_db_path)
+last_db = sqlite3.connect(last_db_path)
+
+
+def get_table_names(db):
+    cursor = db.cursor()
+    result = cursor.execute(
+                        "SELECT name FROM sqlite_master \
+                        WHERE type='table'")\
+                   .fetchall()
+    cursor.close()
+    return set(map(lambda x: x[0], result))
+
+
+def get_index_of_primary_key(db, table):
+    info = get_table_info(db, table)
+    indexes = []
+    pk_names = []
+    loop_index = 0
+    for _, name, _, _, _, pk in info:
+        if pk == 1:
+            indexes.append(loop_index)
+            pk_names.append(name)
+        loop_index += 1
+
+    return pk_names, indexes
+
+
+def remove_tables(db, tables):
+    cursor = db.cursor()
+    for t in tables:
+        cursor.execute("DROP TABLE "+t)
+    cursor.close()
+
+
+def get_table_info(db, table):
+    return db.cursor().execute("PRAGMA table_info('" + table + "')").fetchall()
+
+
+def add_tables(db, tables):
+    cursor = db.cursor()
+    for t in tables:
+        sql_command = "CREATE TABLE " + t + " ( "
+        loop_index = 0
+        for _, name, _type, _null, _default, pk in tables[t]:
+            appendix = ""
+            if pk == 1:
+                appendix += "PRIMARY KEY"
+            elif _null == 1:
+                appendix += "NOT NULL"
+            if _default is not None:
+                appendix += " DEFAULT "+_default
+            sql_command += name + " " + _type + " " + appendix
+
+            loop_index += 1
+            if(loop_index < len(tables[t])):
+                sql_command += ","
+        sql_command += ");"
+        cursor.execute(sql_command)
+    cursor.close()
+
+
+def get_column_information(table, column):
+    table_info = get_table_info(last_db, table)
+    foreign_key_info = last_db.cursor().execute("PRAGMA foreign_key_list('" + table + "')").fetchall()
+    _, _, _type, _null, _default, _ = next(filter(lambda x: x[1] == column, table_info))
+    try:
+        foreign_key_data = next(filter(lambda x: x[3] == column, foreign_key_info))
+    except StopIteration:
+        foreign_key_data = None
+    column_information = " " + _type
+    if _null != 0:
+        column_information += " NOT NULL"
+    if _default is not None:
+        column_information += " DEFAULT "+_default
+    if foreign_key_data is not None:
+        column_information += " REFERENCES `"+foreign_key_data[2]+"`(`"+foreign_key_data[4]+"`)"
+    return column_information
+
+
+def add_columns(db, table, columns):
+    cursor = db.cursor()
+    for c in columns:
+        column_information = get_column_information(table, c)
+        cursor.execute("ALTER TABLE "+table+" ADD COLUMN "+c+" "+column_information)
+    cursor.close()
+
+
+def drop_columns(db, table, columns):
+    cursor = db.cursor()
+    for c in columns:
+        cursor.execute("ALTER TABLE "+table+" DROP "+c)
+    cursor.close()
+
+
+def change_columns_type(db, table, columns):
+    cursor = db.cursor()
+    for c in columns:
+        cursor.execute("ALTER TABLE "+table+" ALTER COLUMN "+c+" "+columns[c])
+    cursor.close()
+
+
+def update_all_columns():
+    # In this call last_db and current_db must have the same tables
+    last_tables = get_table_names(last_db)
+    for table in last_tables:
+        columns_last = {k: v for k, v in map(lambda x: (x[1], x[2]), get_table_info(last_db, table))}
+        columns_current = {k: v for k, v in map(lambda x: (x[1], x[2]), get_table_info(current_db, table))}
+        columns_to_add = {}
+        # columns_to_remove = []
+        # columns_to_modify = {}
+        for name in columns_last:
+            current_column_type = columns_current.get(name, None)
+            if current_column_type is None:
+                columns_to_add[name] = columns_last[name]
+            """elif current_column_type != columns_last[name]:
+                columns_to_modify[name] = columns_last[name]"""
+        """for name in columns_current:
+            last_column_type = columns_last.get(name, None)
+            if last_column_type is None:
+                columns_to_remove.append(name)"""
+        add_columns(current_db, table, columns_to_add)
+        # change_columns_type(current_db, table, columns_to_modify)
+        # drop_columns(current_db, table, columns_to_remove)
+
+
+def get_line(db, table, condition):
+    cursor = db.cursor()
+    result = cursor.execute("SELECT * FROM "+ table +" WHERE "+condition).fetchone()
+    cursor.close()
+    return result
+
+
+def insert(db, table, values):
+    cursor = db.cursor()
+    query = "INSERT INTO " + table + " VALUES("
+    query += "?"
+    for v in values[1:]:
+        query += ",?"
+    query += ")"
+    cursor.execute(query, values)
+    cursor.close()
+
+
+def update(db, table, keys, values, where):
+    cursor = db.cursor()
+    query = "UPDATE " + table + " SET "
+    query += str(keys[0]) + " = ?"
+    for k, v in zip(keys[1:], values[1:]):
+        query += "," + str(k) + " = ?"
+    query += " WHERE "+where
+    cursor.execute(query, values)
+    cursor.close()
+
+
+def insert_and_update_information():
+    last_tables = get_table_names(last_db)
+    cursor_last = last_db.cursor()
+    cursor_current = current_db.cursor()
+    for table in last_tables:
+        columns_last = [k for k in map(lambda x: x[1], get_table_info(last_db, table))]
+        content_last = cursor_last.execute("SELECT * FROM "+table).fetchall()
+        pk_names, indexes = get_index_of_primary_key(last_db, table)
+        for line in content_last:
+            key = []
+            for i in indexes:
+                key.append(line[i])
+            condition = str(pk_names[0])+" = '"+str(key[0])+"'"
+            for j in range(0, len(pk_names[1:])):
+                condition += " AND " + str(pk_names[j+1])+" = '"+str(key[j+1])+"'"
+            row = get_line(current_db, table, condition)
+            if row is None:
+                insert(current_db, table, line)
+            elif tuple(row) != tuple(line):
+                update(current_db, table, columns_last, line, condition)
+
+    cursor_current.close()
+    cursor_last.close()
+
+
+def backup():
+    if not os.path.exists("./backups/"):
+        os.makedirs("./backups/")
+    copyfile(current_db_path, "./backups/db-"+datetime.now().strftime("%d-%m-%Y--%H-%M-%S")+".sqlite")
+
+
+if __name__ == "__main__":
+    backup()
+    current_tables = get_table_names(current_db)
+    last_tables = get_table_names(last_db)
+    tables_to_remove = current_tables.difference(last_tables)
+    tables_to_add = last_tables.difference(current_tables)
+
+    remove_tables(current_db, tables_to_remove)
+    tables_information = dict()
+    for t in tables_to_add:
+        tables_information[t] = get_table_info(last_db, t)
+    add_tables(current_db, tables_information)
+
+    update_all_columns()
+    insert_and_update_information()
+
+current_db.commit()
+current_db.close()
+last_db.close()
\ No newline at end of file
diff --git a/ubumlaas/experiments/views/utils.py b/ubumlaas/experiments/views/utils.py
index acdf9a52..2298aae1 100644
--- a/ubumlaas/experiments/views/utils.py
+++ b/ubumlaas/experiments/views/utils.py
@@ -41,7 +41,8 @@ def download_model(id):
 @views.experiments.route("/experiment/base_estimator_getter", methods=["POST"])
 def base_estimator_getter():
     alg_name = request.form.get("alg_name", None)
-    algorithm = get_similar_algorithms(alg_name)
+    exp_typ = request.form.get("exp_typ", None)
+    algorithm = get_similar_algorithms(alg_name, exp_typ)
 
     _ret = dict()
     _ret["algorithms"] = []
diff --git a/ubumlaas/models.py b/ubumlaas/models.py
index 93c83d31..3fb0766a 100644
--- a/ubumlaas/models.py
+++ b/ubumlaas/models.py
@@ -1,7 +1,7 @@
 import variables as v
 from werkzeug.security import generate_password_hash, check_password_hash
 from datetime import datetime
-from sqlalchemy import and_, or_, text
+from sqlalchemy import and_, or_, text, desc, asc
 
 from flask_login import UserMixin
 
@@ -53,27 +53,51 @@ def get_experiments(idu):
 def get_algorithms_type():
     sql = text('SELECT DISTINCT alg_typ FROM algorithms')
     result = v.db.engine.execute(sql)
-    types = [(row[0], row[0]) for row in result]
+    types = [(row[0], row[0]) for row in result if row[0] != "Mixed"]
     return types
 
 
-def get_similar_algorithms(alg_name):
+# def get_similar_algorithms(alg_name):
+#     """Get algorithm that can be base estimator
+    
+#     Arguments:
+#         alg_name {str} -- Name of the algorithm
+    
+#     Returns:
+#         list of lists -- all similar algorithms
+#     """
+#     alg = get_algorithm_by_name(alg_name)
+#     if alg.lib != "meka":
+#         cond = Algorithm.lib == alg.lib
+#     else:
+#         cond = Algorithm.lib == "weka"
+#         if alg.alg_typ == "MultiClassification":
+#             cond = and_(cond, or_(Algorithm.alg_typ == "Classification",
+#                                   Algorithm.alg_typ == "Mixed"))
+#         else:
+#             cond = and_(cond, or_(Algorithm.alg_typ == "Regression",
+#                                   Algorithm.alg_typ == "Mixed"))
+#     if alg.alg_typ != "Mixed" and alg.lib != "meka":
+#         cond = and_(cond, Algorithm.alg_typ == alg.alg_typ)
+#     elif alg.lib != "meka":
+#         cond = and_(cond, or_(Algorithm.alg_typ == "Classification",
+#                               Algorithm.alg_typ == "Regression"))
+#     algorithms = Algorithm.query.filter(cond).all()
+#     return algorithms
+
+
+def get_similar_algorithms(alg_name, exp_typ):
     alg = get_algorithm_by_name(alg_name)
-    if alg.lib != "meka":
-        cond = Algorithm.lib == alg.lib
+    if alg.lib == "meka":
+        cond = and_(Algorithm.lib == "weka",
+                    or_(Algorithm.alg_typ == "Classification",
+                        Algorithm.alg_typ == "Mixed"))
     else:
-        cond = Algorithm.lib == "weka"
-        if alg.alg_typ == "MultiClassification":
-            cond = and_(cond, or_(Algorithm.alg_typ == "Classification",
-                                  Algorithm.alg_typ == "Mixed"))
-        else:
-            cond = and_(cond, or_(Algorithm.alg_typ == "Regression",
-                                  Algorithm.alg_typ == "Mixed"))
-    if alg.alg_typ != "Mixed" and alg.lib != "meka":
-        cond = and_(cond, Algorithm.alg_typ == alg.alg_typ)
-    elif alg.lib != "meka":
-        cond = and_(cond, or_(Algorithm.alg_typ == "Classification",
-                              Algorithm.alg_typ == "Regression"))
+        cond = Algorithm.lib == alg.lib
+        subcond = Algorithm.alg_typ == exp_typ
+        if exp_typ in ["Classification", "Regression"]:
+            subcond = or_(subcond, Algorithm.alg_typ == "Mixed")
+        cond = and_(cond, subcond)
     algorithms = Algorithm.query.filter(cond).all()
     return algorithms
 
@@ -87,7 +111,10 @@ def get_algorithms(alg_typ):
     Returns:
         algorithm list -- all algorithm of that type.
     """
-    return Algorithm.query.filter(Algorithm.alg_typ == alg_typ).all()
+    cond = Algorithm.alg_typ == alg_typ
+    if alg_typ in ["Classification", "Regression"]:
+        cond = or_(cond, Algorithm.alg_typ == "Mixed")
+    return Algorithm.query.filter(cond).order_by(asc(Algorithm.web_name)).all()
 
 
 def get_algorithm_by_name(name):
diff --git a/ubumlaas/static/js/config_alg.js b/ubumlaas/static/js/config_alg.js
index 0bdf284a..124bc68c 100644
--- a/ubumlaas/static/js/config_alg.js
+++ b/ubumlaas/static/js/config_alg.js
@@ -95,7 +95,7 @@ function generateForm(alg_config, place_in_id, level_to_modify=0, filter=false){
 function create_ensemble_block(basename, parameter){
     let content;
     content = $("<select></select>", {id: basename+"_value"});
-    let petition = "alg_name="+$("#alg_name").val();
+    let petition = "alg_name="+$("#alg_name").val()+"&exp_typ="+alg_typ.val();
     let _options = give_me_base_estimators(petition);
     _options.forEach(function (e) { 
         content.append($("<option value=\""+e.alg_name+"\">"+e.web_name+"</option>"));