I'd suggest emailing their support then or going through your history to get the page that supplied you with the link. That's all I can think of in that situation.
Begin404
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A member registered Nov 23, 2020
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Fixes and a peek at the new map! comments · Replied to charlie (O-o) in Fixes and a peek at the new map! comments
For everyone trying to update it on their pc. You need to go into your email, or wherever your download link was sent, from when you bought the game. Download it again and delete your old zip version that no longer works. The new version you just downloaded will be the updated version and allow you to play. Basically go through what you did when you first installed this on your pc.