Problem with Advanced Formula Environment

I just downloaded and installed the Advanced Formula Environment add-in.

It is impossible to save a formula, I get the following message:

Sync names with Excel name manager. failed: The argument is invalid or missing or has an incorrect format.

I'am using the Spanish international settings of windows (date formats, lists separators...), with the English version of excel. This way, I can copy the formulas that I find in the web (without having to translate the function name from English to Spanish), but I only have to change the arguments separator (in English it is the comma (","), in Spanish it is the semicolon (";").

I think that my separator (";") is preventing me from using the add-in.

Is it possible to have a fix of this problem?

Thank you