Suggestion: file types

When you choose what type of files can be uploaded to the forum, the string of extansions (.doc, .xls,  ...) is put in the tblConfigurations table, in the field "Upload_files_type. Unfortunately this field is defined as a nvarchar(100), thereby limiting the amount of file extensions that can be entered.

I would suggest changing this limit to at least "255" (unless this causes problems on other DB platform than SQL Server).