As you will probably now see, the Applications category has been expanded and ultimately split out based on the type of server / application.
This will mean that some threads will still be needing to be updated if they are referencing them by name, but it should be pretty obvious which category is what.
Some of the categories won't have content in yet (Skyblock mainly) but you should start to see content appearing and applications opening as appropriate in the categories.
Thanks for your understanding!