Update from Older Theme

[thunderclap]

I originally purchased Focus Responsive for MyBB 1.8.10. Since then we've have 8 updates and I want to update the theme accordingly. That said, the version of Focus we're using is heavily modified to match our WordPress site. Is there a way to update to the latest version of the theme so that it's compatible with the latest version of MyBB without losing all the customization? I assume there will be some manual work, but I would like to avoid having to recreate our modifications for the current version of Focus.

Thank you.

[WallBB]

That is actually a tough task because 8 updates are quite a lot, you will have to do lot of diff check so that you can update it faster.