Got a message a couple of days ago that I needed to upgrade Bambu. This was not a firmware upgrade. After processing the upgrade I can no longer communicate with the printer. I get a bulletin 
Failed to install preset files to C:\Users|BillFarmer\AppData\Roaming\BambuStudio\system, Please make sure bambu Studio has permission to delete and write in this directory, and it is not being occupied by the system or other applications. I have tired to get this corrected to no success. What do I do. Everything was going to the printer properly for two years. ???
X1C