Acrobat XI - Moving to New Compter

Hi,  I've been using Acrobat XI for ever and just installed it after reinstalling Windows 11 on my computer.  Acrobat XI says I am at the max number of users - I have no idea how to find or delete the previous copy of the program so that I can get it running on the new build.  Same computer, just a different C drive and build.  

Any ideas on how to get around this?  

Al Donn, Tampa

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