Make a new map, or open one of the default maps and see if it builds those. If that doesn't work, put in the CD and click 'repair'. If that doesn't work, try uninstalling and reinstalling, and then try using the
V1.15 update (not V1.16). If that doesn't work, then try installing the V1.16 update again, and then install Fenix Mod over that (to see if it runs with a mod exe).
EDIT: And just for the record, your FPS Creator didn't break. 80% of the development process using this software is overcoming daily bugs, errors, glitches, bugs, build errors, bugs, illegal operations, and bugs.

I think just about everyone here has been in the same shoes at least twice a week.
Kravenwolf