thorosii, it’s possible to salvage your deprecated theme (I’ve done it).
But it requires a number of core, unsupported patches and it’s not recommended.
Andy has mentioned that BP is not going to support deprecated themes moving forward.
It would be best to do what Jeff has stated to save yourself the time.
If you really need to know the how to salvage your theme (again I state this is not recommended), let me know and I’ll do a writeup.