Accessability screen after reinstall

Because i still have stutters in version 1.27.21.0, I followed an advice in a flightsim blog to delete the numeric files in directory fs-base-cgl.
After that i started msfs2020 and got the accessability screen and had to download 102 gb (onestore/0fficial dir). Then the message new downloads are available appeared. I clicked ok and then sytem freezes and nothing happened anymore.
I deleted the sim, and tried to reinstall again.
Same screen appeared and again had to dowload 102 gb.
I never had these problems before. Anyone an idea what is happening and maybe a solution?