it’s nice to hear that it works well on ubuntu 18.10. My problem is replicated in a fresh user, so it cannot be a map problem (I also apt-purged and reinstalled the package). It’s not a graphic card issue either; the application seems to work more or less as it should, except that the areas are randomly positioned and sized. So for instance it can happen that I click on the lower part of the application, where one selects the type of area, midi vs. usb keyboard, etc., and a large yellow square appears, which belongs to the controller areas, and should be way smaller. Seems like a bug in how the position and size of areas is computed. Maybe some information that the app gets from the video card does not always have the expected meaning? I’m using hidpi resolutions (4k both on external and on laptop monitors).