4e9eedc1e8
The install fast path treated an openable VHCI interface as 'driver present', but the interface GUID is identical across all usbip-win2 releases while PLUGIN_HARDWARE_ONCE and STOP_ATTACH_ATTEMPTS only exist since 0.9.7.5 — a machine with an older community release passed the check and then failed every Plugin forever. The fast path now probes STOP_ATTACH_ATTEMPTS and falls through to the (in-place, FORCE) install when the driver lacks it. The probe's empty location doubles as cleanup, discarding ghost reattach attempts left by a previous process.