How do I downgrade a version of construct 3?

With this new version, my projects no longer opened, as an error about "invalid file" occurred. and I wanted to downgrade the version to run them, how do I do it?

construct.net/en/make-games/releases

If your project does not load in the latest release, please send a copy of your project to supportggh@construct.net and we'll try to make sure that it can be opened. Assuming there is a problem with Construct itself and not a third-party plugin, then such issues are a high priority for us.