Hello @Wolf , what you mean is ?
A) run two Freeters at once
B) open workflow in new window
C) one Freeter across more monitors?
from quick peak into code on github, I think:
A is probably not possible due to framework limitations
B should be doable, maybe with some limitations
and i hope it is not C
Note: I am not a developer of the app so take my words lightly I just like the app and want it to grow.
...
If you wanna play around you can try:
download source code and build "your" version of Freeter, named f.e. FreeterNotes. You should be able to install and run the original and yours, but each will have separated data/projects/workflows.