
1) I don't subscribe to creative cloud (honestly just thinking I should at this point though) but I am able to access it on my laptop from a few years ago when I was doing a free trial.
2) I hope I'm answering this question correctly, I have Lightroom 6. I bought a code from best buy so I could install it onto my laptop.
Your system is messed up! "Classic" as a Perpetual install should not be possible.
Another user sucked in to an upgrade that does not work (and should NOT work without a subscription)
After un-installing Lightroom- You have two choices to get Lightroom working as it should-
1) Re-install v6.0 and update it to v6.14, then stay with v6.14
2) Subscribe to the Creative Cloud Photography Plan and install LR-Classic-CC