I previously updated from version 3.8 to 6 and paid a fee. It was a stand alone and I didn't intend to change that. The upgrade was fine for awhile then it said the trial version had expired and I had to pay to continue using it. I tried to go back to the old one and now neither will work.
The new one gives the message:
Updated Version Required
Your saved data appears to be newer than this version of 1Password can use.
Please update your copy of 1Password to its latest version.
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided