This situation exists since months. You can take a look at my post history. The annual license business model is a joke as the core functionality is broken since autumn last year.
My hope is for the new software version 3. My fear is that it will take up to a year to get any usable version from the new branch. Still core functionality missing and not really tested very well yet. As far as I can tell there will be no development on the current version (1.5+) at all - at least there hasn’t been since last year.
To be completely honest: there sadly is no real alternative for Linux… as soon as there is anything comparable I’ll happily switch. Until then I am stuck with Insync.