@fairygirl18 Yes, if a mod has an updated version, delete the old version and download the new one. You can start with those in your testing. You can also check the list of core and injector mods in Broken/Updated Mods to make sure you're on the current versions of those and add them to your Mods folder. Check those lists for known broken mods to delete, too.
After that, add back what's left in batches, and test after each batch. (Exit without saving!) If you have a batch that fails, you can remove part of the batch and delete localthumbcache.