Developer reply by Günter Gersdorf
Rated 5 out of 5 stars
One of the most amazing plugins for Thunderbird I know.
I just upgraded from "legacy" Thunderbird to version 91.8.0 as most plugins are now available, but unfortunately I have a problem with Copy Sent to Current:
Whatever I do, the "select on send" option does not show up in the account settings.
The extension is enabled for all my email accounts.
If someone has the answer to that problem I will love it!
Jeff
This and all other options has been moved from the account settings to the settings of the addon.
To create your own collections, you must have a Mozilla Add-ons account.