My problem is also that jaksta wont record anymore with macOS Sierra. When jaksta is turned on, than I can not starte internet sites
Unfortunately there is a current issue with macOS Sierra, we have a workaround here:
Sorry for the inconvenience, we are working on a more permanent fix.
We now have a beta version which should work properly on macOS Sierra:
This should work in Safari and Chrome. Let us know if there is still any trouble.