I'm hoping this is a bug rather than an orchestrated way to extract more money from me on top of my modest standard subscription from two years ago…
All I did was install the latest High Sierra security update and after the reboot, BTT had disappeared from my menubar and refused to launch - telling me it was no longer supported and I would have to buy the latest version.
My OS version hasn't changed - it's still 10.13.6 - so there is no logical reason why BTT should suddenly be incompatible. In fact, it works fine on another Mac also running 10.13.6. So what just happened?
I followed the update links and tried to choose the "downgrade to latest supported version" option but nothing happened. So how do I continue to use BTT v2.428 in Os 10.13.6 where it was working happily until yesterday?