Thunderbird vers 142.0.0 is a x64 bit version??

I have big problems with my Thunderbird being stable. For more than ½-1 year almost, it crashes every single time eventually during mail checks. It works several minutes and pulls down emails (IMAPs) and then suddenly it crashes TB. It's a 32-bit version I use.
It checks many email addresses (20+) I use for different tasks.

Is there a x64 bit version also?
-could this be part of the problem why it crashes after a little time?

I used it before for many years without it crashing!

Any suggestions to what it can be??

~J

TB portable: 140.2.0esr (32-bit)

My desktop PC:
CPU: Intel Core i7-6700 @ 3.40MHz
OS: Win10Pro (22H2) build: 19045.6216 (64-bit)
RAM: 32Gb (speed: 2666)
Graphics: Intel HD 530 (128Mb)