It looks like there is a problem with the display of effects list in the Effects Library when the username in the system has Cyrillic characters.
Example:
The library is located by default at C:\Users\Cyrillic UserName\AppData\Local\Itoo Software\Forest Pack Pro\effects. The list of effects is empty.
If you copy this folder, for example, to C:\Test\effects and replace the path to it in the HKEY_CURRENT_USER\Software\Itoo Software\Forest Pack Pro\EffectsDir\effects registry, then everything works as it should.
Tested in FP 7.4.3