On request of Alex , I added the possibility to specify multiple input dirs.
You can add an input directory by clicking the + button on the top right.
You can remove it again by pressing the - button next to the directory name.
A dupe instance in a different directory will now show its path to its input dir. Tooltip still shows the full path to be sure.
While I was at it, I had a look at how Github Actions work and implemented a workflow for building and releasing. Now, I can build all platforms without having to spin up the OS and dev env myself. 🎉