When I try to input the private key on Electrum the next button doesn't work. It stays grey and can't select it. Could I be doing something wrong? Do I copy the whole private key?
Sorry for not getting back to you promptly on the other thread - volunteer support and all that.
For Electrum you need to input the line that starts with PrivBase58 with no spaces (and don't include "PrivBase58:" itself).
Armory has an option to "Omit spaces in key data" which will make that easier.
Ideally just the one line that corresponds to the receive address you used.
If that works, Electrum should display your address and balance quickly after.