I was wondering about the same

Seems really abandoned. BoltAI is much more sophisticated, glad I switched. I wish the MindMac developer well, and hope the lack of updates is not from something serious. He now has a lot of work to catch up should he return to the app.

I've requested refund at the end of August, but did not receive any response

If you're looking for alternatives, https://boltai.com/ is extremely active in development, as is Msty.app (my personal favorite right now). I had a lot of high hopes on MindMac and even purchased multiple licenses, but LLMs are moving way too fast for this kind of slow development.

Crickets.