thanks Vaelin (you golden god), I found the location. it was in User, then mostly all the folders you mentioned. Coins came back after a blockchain rescan.
updates are always a nerve wracking process for me.
I am pleased it worked for you.
Do you have your seed written down somewhere? That would be my go to solution if I couldn't figure out what to do with the .dat file. You should have it anyway incase your hard drive corrupts/laptop gets stolen. You don't want to leave that up to fate.