Thanks. They are simple joystick/gamepads (8-direction arcade stick and a few buttons). No analog shaft/control etc. and no Competition Pro. Two of them are connected via 9-pin (Atari-type) to USB adapters. The third has a direct USB cable. They have no configuration options. I can only see them in the "Setup USB game controllers" section where simple test/calibration settings are available. I cannot really change anything there.
I tried disconnecting them, and restart Blastaway with only one connected but nothing changed. Perhaps the installer version might give a better "integration" with Windows, or I'd get the same result?