Currently the user interface is available in English and German. The language is chosen by the add-in according to the language of the Excel GUI.
To execute the unit tests in the module mdl_UnitTestRound.bas the the COM add-in rubberduck needs be installed (https://github.com/rubberduck-vba/Rubberduck). (Thank you guys for your work)
Download the file download_inoRound.zip to your system and unzip the content.
In Excel use File - Options
Choose tab Add-ins and select "Manage Excel-Add-Ins" and click go.
Use "Browse" to select inoRound.xlam and make sure Inoround is ticked.
Now the Add-In is available.
The Add-In is available on the Home Tab between Number and Styles
To round figures in calculations select the cells and use:
1 to round flexible
2 to round up
3 to round down
The number of digits to round to is defined at 4.
If 5 "Round numbers" is ticked given figures are rounded as well.
6 remove existing round