Hi and thanks for reading this.
My wife and I have both used TB for years - mine as Portable TB on an external drive and hers as regular TB on her C drive. With her SSD getting full-ish, I decided to move her over to Portable TB on an external drive, but I've hit a problem.
I installed Portable TB on the drive and it ran fine, so I copied her original profile to the external drive, and again, no problem. TB fired up and I could see her existing email, and downloaded 20-odd new messages.
Thunderbird also carried out an auto-update, which all went normally - i.e. the update happened and TB restarted itself OK. The problem is this: I then exited TB and - an hour or so later - started to show my wife how to run the Portable edition. Instead of starting up normally, TB threw up the following error:
Mozilla Thunderbird, Portable Edition, cannot be started. You may wish to reinstall to fix this issue (ERROR: thunderbird.exe could not be found)
I'd be grateful for any help with this, as I'm foxed.