Before you update, make a back-up copy of the theme you use, i.e. the Resources folder (and plug-in mods, if you use them).
Just to be sure, I then replaced my Resources folder with the original 10.0.6 Resources folder. (This step might not be needed, but you’ll never know.)
Make a back-up copy of the whole Logic app (right-click > “compress”).
Drag the modded tifs and MAResourrcesMapping.plist from your theme to the new Resources folder. (If you can’t see from the time stamps, which tifs have been modified, re-download the theme, they usually have only the modified ones of the tifs.)
In 10.0.7, the mixer faders are slightly smaller than before. That may cause some issues in some modded themes. We’ll see. Please report below, or to the modifier at GearSlutz.
Do NOT use the Theme Switcher app at this point, it has been reported that it does not work with 10.0.7. Wait for the developer’s instructions.