MicroSquirt.com read only forum (Jan.15,2018)

just looking for some tuning software for the mircosquirt 3 that allows for usb to rs323 with out having to fork out $60 like tuningstudio

The free version supports USB adapters - it just uses the standard driver and not the somewhat faster D2XX option. Unfortunately, the documentation can be a bit confusing; you're not the first to think it doesn't support any USB, when this is not the case.