Hello, welcome to this project. The purpose of this project is to track updates from the whmcsfull.com site and ensure the latest versions are made available.
I want to emphasize that this project is for educational purposes only. I do not intend to cause any inconvenience or engage in any illegal activities. My sole intention is to provide others with an opportunity to test the software. If you have the means to purchase the software officially, I encourage you to do so.
Feel free to share your ideas or questions; I will respond as soon as possible.
Best regards.
I wouldn't recommend going back, in fact, there is no guide for doing so.
What I suggest is to try downloading the new version manually and running the update script manually from the /install folder.
Here is a guide to help you do that.
https://docs.whmcs.com/system/updates/update-tutorials/update-in-the-browser/
As for the compatibility issues with the modules and the disorganized appearance, it is likely a cache issue. You should clear the cache in your WHMCS, and if you're using Cloudflare, make sure to purge its cache as well.
If the module issues persist (though I doubt it), since all WHMCS modules from version 8.10 work even in the latest release, as modern modules use standard functions and should be compatible. However, if that’s not the case, contact the module developer and ask them to fix the issue or provide an update.
If you’re using cracked modules, you will need to purchase support to resolve the problem.