Rather than landfill an "almost working" t.Flight HOTAS, try this rebuild procedure and see if you can't revive it.
also learn more about your Right to Repair
EDIT: there is a new release of drivers and firmware on the TM website for 2021, it is advised to download an run the exe which will first uninstall the previous install (if it exists) and restart the PC
then it will install a new driver for the T.4…. likely also applies to the other t.flight models as well