Are you able to give better instructions regarding how to upgrade the wallet for Ubuntu?
"How to update the Bitcoin 2 Core Wallet?
Just download the newest .zip/tar.gz file and copy the executable files in the bin folder to replace the ones you had installed already."
When I try to start the new bitcoin2-qt I get the message: Could not display "bitcoin2-qt"
There is no application installed for "shared library" files.
Do you want to search for an application to open this file?
Did you download this one:
https://github.com/BITC2/bitcoin2/releases/download/2.2/bitcoin2-2.2.0-x86_64-linux-gnu.tar.gz ?
If so, will look into the problem.
Which Ubuntu version is that? 64-bit? Trusty, Bionic, etc.?