USB Blaster disapears from the hardware setup of the quartus prime programmer when I connect a com port with the teraterm using an FTDI usb to I2C adapter.

Of course I tried, there is no usb hw present in the list when my terminal is open with the com port (that was my original issue).

I tested with quartus 18.1, same issue.

To work around the problem, I will program my FPGA using another pc.