@KatyFernlily do you mean you're having trouble with custom content, or store stuff, or both?
If you're only trying to use store content, not CC:
I have no idea if this will help at all, but my EIG was crashing when my mods folder and my DCCache folder were intact. I took out my mods folder completely, and I removed the .dbc files from my DCCache folder (putting both mods folder and .dbc files on my desktop), but kept the rest of the folder intact. EIG then worked for me, and I could still use my store content in EIG. I then exported and installed my world, added the mods folder and .dbc files back, and when I loaded the world everything worked perfectly and the store content still showed up.
If you do mean non-store CC, then I have no idea :(