There are threads here that describe how to fix weird stuff that happens during your start of the program ( whatever version that is or OS). Basically, just do a search in forum for " fix weird stuff " and you'll find it.
No such luck. Is it worth it to uninstall and re-install the program?
I don't know. If your program worked before with fonts installed but now all of a sudden they aren't there, then maybe you did something in computer that effected that, or maybe a gazillion other things. There's a way to start the program 'fresh' and you should probably try that first. Otherwise you have to supply more info ( how to ask question info needed for others to help).
Or just re-install but use that cleaner tool thing … maybe someone else will be a font expert and give you magic solution.