Just a quick question. My NanoWallet on my computer remembers which wallets I use.
From the start / login window you can select which wallet you want. Does that mean they are stored locally on my computer somewhere or in the memory of NanoWallet?
Off course the big question, is that safe?
You nanowallet stores your private key encrypted using your password.
If you want delete it from computer you can use purge option (bottom right on login screen).
But you must remember that to restore it is required have wlt file+password or private key!
Thanks Pawelm! Cool, I didn’t know it was encrypted using my password. 
Because you are beginner should you also read:
Don’t forget do backup of your private keys, wlt file and password.
Have a nice day!