Reinstalling the SIM

Hello. I bought MSFS2020 thru windows store. Had it instaled on my disk. Unfortunetly i had to do a win reinstall. After doing so I wanna install only the missing pieces that are necessery to be on the system disk (the sim is on another disk). Is there a way to do so. If i rty launch the install from the store and point out the disk that already has MSFLIGHT on it nothing happens. If i use another disk im able to continue with the instalation. I dont wanna download it all.