I own TSW5 on my pc which works perfectly fine, i got the PC editor ages ago from epic games and it gets to about 75% loading or so and crashes. Does anyone know how to fix this?
Have you tried starting TSW5 before starting the Editor? When the Editor is fully launched, you can close TSW5. You need to do that once after every update.
You said you got the Editor "ages ago". You use the TSW5 Editor not the TSW4 Version, right? Have you checked if there are any updates available for the Editor?
What store did you get the game from? This only works with the Steam and Epic Games versions if I recall correctly.
If I recall correctly the Microsoft Store/Xbox Launcher version of the game is not supported still. You need it on Steam or Epic Games, as well as the DLC you want to use within the editor.