an Alix2 folder in Alix1
Why? That was not the instruction.
Because wallets generate some temporary files, wallets are in their own directories which are located either in the datadir (as you have done) or in a wallets folder inside of the datadir. There is no nesting further than that.
I'm wondering but does the fact that the file is in Notepad format change anything? (. Dat, but opened with Notepad)
If you did not see a bunch of garbage characters in notepad (as in it opened and it looked like normal text), then the file is not a wallet file. If you made any changes, then it would be corrupted and unopenable.
Please follow these instructions and stop doing whatever it is you think is correct.
In Bitcoin Core, go to File > Close All Wallets. Then shut down Bitcoin Core. Go to your data directory and delete (or move out of the datadir) all wallet files and all directories containing wallet files. Inside of the datadir, create a folder named
wallets. Inside of the wallets folder, create a folder with the name you want your wallet to be named. Inside of this new folder, copy the wallet.dat that you have. Start Bitcoin Core, there should not be any wallet loaded. Go to File > Open Wallet and choose your wallet. Please inform us whether this worked or if there was an error. If there was an error, then tell us what the error is. Even better would be to post a screenshot of the error.