George,  that was me.  Had updated Thunderbird from 32bit to 64bit and it turns out 32bit programs, which part of Lacerte really is, can't call through MAPI to 64bit programs.  Had to go back to 32bit Thunderbird where it worked just like it used to with the 2021 program until this last update.  As I said, 2020, 2019, 2018  etc... No problem creating an e-mail with the respective years Lacerte file attached right now.  It is specific to the last update in the 2021 program.  Thanks for the effort though, keep the good fight going!