If any program is capable of convert .frc files to .fwp, it would be FLAMES from which both these file types originate. Whenever the conversion is actually possible or even useful is another question. We haven't found any relevant information about this subject though, so if you know any, please write it in the discussion below.
Convert FLAMES Recorder output file to FLAMES Windows Viewer project file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert frc to fwp on Windows
A family of simulation products for commercial and military vehicles and systems
Convert from frc file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.