Hello natelikesoreos. Read this, is from Nebula FAQ:
Q.4.3 When I load Nebula there are no emulation presets parameters, only an init. What's wrong? You didn't download and install any emulation presets or, if you have downloaded and installed the emulation presets in a different folder to your Nebula folder. Navigate to your VST plugin folder you will find a folder named "Acustica", inside this folder you will see two .XML files. Those file are Nebula MAST page settings. Right click on the file, and click on edit. You should see the below text:
As you can see, the emulation presets (N2P and N2V files, stored in programs and vectors respectively) are in C:\nebulatemprepository\ (PC). On a Mac, it is located in HD/library/audio/presets/acustica audio/nebula. Check if Nebula is searching for your emulation preset in the right folder on your hard drive by referring to this file.