99.9% (estimated) of Lr5.5 users are not having the problem you are (can't export).
That said, for this type of problem, you may want to consider Adobe technical support instead of the forum - I prefer chatting..
If you want some advice from a fellow blind user: try renaming your preferences file (and all other Lr data files if preference file doesn't make a difference, try a new catalog if still no luck). If still the same error, consider posting the rest of that error message - it could be you just need another "win 32" file not being installed by Lr installer, but without knowing the filename, it's kinda hard to say.........
Preference and other file locations in Lightroom 5
PS - the logic: "no problem til Lr5.5, so Lr5.5 code at fault" sounds good on the surface, but is surprisingly flawed - perhaps you should consider yourself lucky the other versions worked despite the potential for problem, rather than considering yourself unlucky that you got nailed when upgrading to Lr5.5 .
Don't shoot the messenger ,
Rob