Can't open software; says it's already activated on two devices but it's not

Suddenly, Creative Cloud for Enterprise and Adobe Acrobat Pro will not function on my PC. Error message is that I have already installed Acro Pro on two other devices. Yes, I have. That's because I have two licenses: (1) Acrobat Pro Mac, installed on two computers as allowed and (2) Acrobat Pro PC (installed on one Federal Govt PC). How do I fix this????