Hi! Glad to hear you like the DM Helper so much that you want to carry it across your systems! We don't have a Linux version available. It is on our overall feature roadmap, but no specific timeline plans for a formal release.
What I can offer is to try to cross-compile and see if there are any fundamental issues or problems and at least provide a one-time v1.6-based release to make sure your game can continue as it has. I would recommend you to jump into our Discord and we can chat further about how this goes.