I guess I misread the directions while trying to delete a category and reassign the topics to a new category. I can no longer access the topics that were under the deleted category, however the topics still show under "recent posts". I tried to recreate the category but can't rename the new category with the old slug (this seemed like the easiest way to fix things). Is it possible to "trash" the old categories/slug so I can recreate them? Other suggestions?
Please navigate to Dashboard > Forums > Dashboard admin page and click on [Delete all caches] button. Then delete other plugin caches, press Ctrl+f5 on forum front and check it again.