use IF statement to determine pre-existing data folder

[scheckley]

…-existing data directory

Description

This parameter doesn't seem to be used in the rest of the script:

KH_APP_DATA_EXISTS = KH_APP_DATA_DIR.exists()

Therefore, amended the pre-existing directory check with an IF statement to perform the check:

if not KH_APP_DATA_DIR.exists():
    KH_APP_DATA_DIR.mkdir(parents=True, exist_ok=True)

Type of change

• New features (non-breaking change).
• [ x ] Bug fix (non-breaking change).
• Breaking change (fix or feature that would cause existing functionality not to work as expected).