The appimage seems to be stable now so I'm looking for people to test it!
Feel free to try it out and if you have any problems with it open up an issue.
Incase you don't know how to run an appimage the process is simple
Download it.
Set it executable (chmod +x ./pineflash*.appimage) or with your file manager.
Run it!
The only dependency is fuse2 and you should have that already.