I appreciate the support, and I truly understand the request.
Unfortunately, there is no method to distribute updates to GameMaker Marketplace buyers anymore.
When possible, I’ve already shared the last Marketplace-compatible version individually as a courtesy, but this cannot be offered as an ongoing or official update channel.
itch.io is a separate marketplace with its own licensing and delivery system, so updates here cannot replace purchases made on the GameMaker Marketplace. The viable option at the moment is to get it from Itch.io to get the latest updates.
I genuinely appreciate everyone who supported the project through the Marketplace, but at this point there is no reliable way to provide continued updates through that platform.