Since version 2 of Reports ForNAV, you can have multiple versions of the product installed and in use at the same time. This means that your reports can use different versions of the ForNAV add-in.
If you need to know which version you use for a specific report, you can look in a couple of different places.
The first place to look is the Version List in C/SIDE.

The version list will show the full version number of the add-in DLL that is used in the report. The last part after the forward slash shows the build number of the ForNAV Converter or Designer, which was used to create and save the report the last time it was modified.
Apart from the version list, you can also see the version in the global variables of the report. The subtype of the ReportForNav variable looks like this:
ForNav.Report.’ForNav.Reports.3.0.0.1272, Version=3.0.0.1272, Culture=neutral, PublicKeyToken=5284c1af2984feb0′
This tells us that the add-in version is 3.0.0.1272 in this particular example.
Indlægget Which version of ForNAV am I using blev vist første gang den ForNAV.