Welcome aboard!
Answers below:
1). Help > Debug > Console
dumpprivkey <Luxaddress>
Reveals the private key corresponding to <Luxaddress>
2). Copy/paste from step 1. Make sure you take all security measures before, to avoid exposing your private key
3). Encryption is already there. Backup from the UI is not implemented at this time. Just go to %appdata% (type that in Win Explorer address bar) and look for Lux folder. Backup wallet.dat and you're good to go.
4). Minimal version has the diff graph disabled to reduce lag. New wallet (with new cool features) is planned soon - should also fix lag issue
That being said, head to our site and have a read. Have fun & happy mining.
https://luxcore.io/Thanks!
Thanks again, you have been helpful
Regarding the "encryption" tab, i hadn't see the position of the tool bar... at the bottom
Now, something else, I would be interesting in mining luxcoin
I have found, at the first page of the announcement, all the pools and miners but I would also like to know what AMD cards are preferable,
RX*** or cards from other series?
Thanks