Do you have any backups or notes for these tools?
Do you have backups for your machine?
I keep copies of all my Audacity installers. Do you know which Audacity you were using before this one? You can back up Audacity versions. It’s not that hard.
For one example, this is the Low Rolloff for Speech (Rumble Filter) for Audiobook Mastering.
I could regenerate the effect from that if I had to. I also have it as a text curve generation.
I would be going nuts trying to find out what happened. If your machine is now unstable, you may be in the market for a new one to keep your work going.
Koz