That's weird, it works fine on Chrome on my Nexus 4 (under Lollipop too).

You can also close the menu by clicking outside of it. This doesn't work ?

The raw file section is completely agnostic to the type of the files you share.

I just tested it to be sure: you can share folders of images.

Did you activate user management ? If so, did you give adequate rights for the image folder ?

Another possibility: some wide exclusion pattern (in the advanced settings) that might match the path of your image folder.

Yes, scanning the command prompt to trigger a scan would be easier. Not very convenient, but why not.

I'll add it to the backlog.

No it won't work: Ubooquity is a Java SE application, not an Android one.

Thanks. :)

you're welcome. :)

Well, I don't know much about Python myself. :)

I plan to use Java Mission Control.

But don't bother yet. Once I have done my tests, I'll come back to this thread with what I found (or didn't find). Then I might be able to tell you what I am looking for (or I'll have found and fixed bugs).