I am using Mint 19 and I have a 250 GB SSD dual boot, but the Windows install has corrupted. Since I don't use it anyway, I am trying to set up a 120 GB SSD as a Linux-only system.
I was able to do this and it booted fine (after a boot repair!), but for reasons I don't understand, although Timeshift restored all the programs from my 250 GB drive, it did not restore the settings, configurations and customizations in the programs; e.g., my Thunderbird accounts, Firefox settings, etc.; not even my desktop screen settings. I tried re-installing Mint and restoring again but had the same problem. I even tried setting up the 120 GB drive as a dual boot (it was, and worked, previously), but same problem with Timeshift. I have restored from Timeshift many times very successfully and this is the first time this has happened.
How can I restore my configurations and customizations, etc?