I have UAC enabled on all my Windows Systems and never encountered any of your issues. And yes, I did copy my JDownloader folder around my system.
You are aware that "a second account" with admin rights does NOT have privliges to access the files of your "first account"!
You cannot access other users data without rewriting permissions with help of your admin privliges! Please learn
how windows ownership/group system works!
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JD-Dev & Server-Admin
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