Sorry, I didnt understand the initial problem. If you check out the readme, it mentions that it does support using CVI 5.5. The fp for fgen 2.x should work with CVI 5.5 as well. There were no breaking function panel changes between the different versions of CVI and since you are using the fp and the import libraries, you should not have any problems.
I'll inform the appropriate people to make the document a bit more clear.
Bilal
Bilal Durrani
NI