Duplicates when adding a sub folder

Since I started using Serviio, I'm using a library folder setup like this:

D:\User\Movies\Download\000 [x] [ ] [ ] "WatchNow"
D:\ [x] [x] [x] "BrowseAll"

In words: I have a lot of files in D: and want a quick link to some files in a subfolder.

I understand this is not longer supported in Serviio 1.5.
But it's obviously only a check on the client console.
My old configuration worked perfectly in Serviio 1.5.1. and 1.5.2 until I tried to add a new online resource.
Now the console is telling me I have duplicates.

And since I removed the entry D:\ - my working configuration is gone for good.

Please help me, can you fix this?
Console could report an information of duplicates (and proceed saving) instead of canceling the Save procedure at all.

Or is there a possibilty so send an "add folder" request via CURL or something?

[zip]

That is not supported anymore due to the changes of scanning library in 1.5.x. It will not come back I'm afraid.

But scanning those directories works fine.
It's just the AddDir what's checked and cancelled.