The choices are:
Single-sheet backup (printed) . (this is, I guess, the logical choice...)
Definitely this one and this time uncheck "This is a test recovery to make sure my backup works."
I've restored Armory wallets many times, but there are a substantial number of coins involved, here. It would be a disaster to lose them. Also nervous because this wallet has served me well for so long and for it to suddenly stop working is concerning. Also, the coins in the wallet came from a multi-sig wallet and my understanding is that the person who extracted them had to go to some extraordinary lengths to get them out. Like I said, the balance shows correctly in the Armory online dashboard, so...what could go wrong?
I understand your worry. If it helps, whatever lengths that the tech had to go through to send you your coins cease to apply once the coins are in your wallet/at your new address. From your info about the address starting with a 1, I can tell you that your coins are in a normal P2PKH Address, which is the easiest to recover to any other wallet if it comes to that (but you've not mentioned any problems with your online PC/watching-only wallet).
I'll lay out the process before you commit to it - nice to not go in blind:
After you click "Continue" on the first "Restore wallet from Backup" step, you input your paper backup as you did before to test.
When you hit "Restore" on this step you'll get three options: Cancel, Merge and Overwrite.
I would say that "Merge" is the option you want. My understanding is that it'll retain existing information and fix whatever is wrong with your wallet (if anything) and will allow you to choose a new password.
After that it'll take a short while to recreate the wallet. Since you're doing this on your offline PC you won't have the long step of rescanning the blocks for transactions.
Armory made a backup of the actual wallet file for me as part of this process when I tried it out on my test wallet.
Make a note of the ID that is listed next to the wallet in the main Armory view.
The backup appeared in a timestamped subfolder in this directory:
%appdata%\Armory\walletIDhere\
I haven't
actually tested that this file worked, but it seems logical.
If you're still worried you can choose to manually create a copy of the existing wallet files beforehand like so:
Close Armory entirely.
Go to
And copy every file that has the walletID in the name to another location on your offline PC.