https://support.mozilla.org/en-US/questions/1234751

The Manually Sort Folders add-on has an option to set the default startup folder, no matter which folder was open at TB exit:

http://forums.mozillazine.org/viewtopic.php?p=14811751#p14811751

This version works in TB 60.2.1.

Hi.

Unfortunately, the add-on wont "select and retain" any of my input settings in TB 60.2.1 (32-bit.) This is extremely frustrating.

I don't understand why this happened.

Thanks anyway... Any other ideas or a fix?  :)

There is a Firefox 62.0.3, but the latest TB is 60.2.1. Did you install the add-on in Firefox or TB? To install in TB, drag this link and drop it onto Tools/Add-ons/Extensions in TB.

Before you install any add-ons, I suggest you first follow the instructions given in the first link of my first reply.

@sfhowes -

My apologies. I corrected the above posts. It is Thunderbird 60.2.1 (32-bit.)

The first link solved the problem. Had to delete the session file.

https://support.mozilla.org/en-US/questions/1234751

No need for the add-on, which didn't work.

Thanks so much. I really appreciate it.

Don't know why my search didn't pick that up that fix.

Cheers! :)