for a few days now, i have a very confusing problem.
i wanted to play around with the fpga and used the usb blaster sketch to program the fpga via quartus prime. this worked perfectly for a few weeks.
now when i connect the vidor to my pc to program a different sketch to it, the vidor doesnt connect to the pc. the arduino ide cant find it on any port and it doesnt show up in the device manager from windows.
and when i open the ide after i connected my vidor all my installed boards in the ide are deleted and i am unable to install them again, because when i open the boards manager it shows "http://downloads.arduino.cc/package_index.json file signature verification failed. file ignored"