I figured out the problem, if you have too many assets in the assets folder the game will slow down massively once a certain threshold is hit. It doesn't matter how big the files are, only the amount matters, I had a tons of obj. data files and around 250 images which caused the game to basically refuse to start.
I didn't notice at first as I added the images and then went to sleep, and then the newer version came out so I installed it an deleted my old installation . So when I started the game I assumed the problem was caused by the new version.

Me and someone else form the discord eventually figured it out as we had the same problem, their first conclusion was that it was a 1GB cut off point, but when I checked I was only at 400mb with my full set up , even when I deleted most the game still took long and I was at 250mb. They ha dno problem until around 1GB, so we concluded that the number of files caused trouble as some of his images were not optimized and took 20-30 mb per images while most of mine only took 3-4 mb.