For some reason, your email is bouncing. It never rains but it pours.
Press and hold SHIFT when double-clicking the Tinderbox App, or when clicking it in the dock. This will tell macOS you don’t want to reopen the current document.
That should get you back in business.
If possible, send me a copy of the document that hangs.
Unfortunately, the Tbx file I used to export my Obsidian .md notes was not yet saved at the time I used it and I did not have time to save it before it suddenly crashed. Even some appropriate erasements using EasyFind did not solve the problem. Is there any way to access to the content of a file by using a specific command? Or, is there a special repertory — such ~/Library/Containers/Tinderbox — I should explore to solve it?
Indeed, I’ve been increasingly suspicious since yesterday that something is wrong in your macOS installation. This has the feel of a damaged disk — what does Disk First Aid say? — or even defective memory…