From https://github.com/VCVRack/Rack/blob/v2/CHANGELOG.md:
Use new .vcv patch format, an archive (POSIX tar compressed with Zstandard) of a patch.json file, module patch assets, and potentially other future files.
Cool! Pro-tip for Windows users: Total Commander - the best file manager ever made, possibly the best piece of software I’ve ever run, for 20+ years now. Ridiculously low price for a lifetime license, also shareware, always rock-solid. If you ever liked Norton Commander, Volkov Commander, Midnight Commander or the likes, this is for you!