I suspect there is a potential for an enhancement, so judge me please:

I have my project open with no other files loaded into editing than the Untitled (it is optional, otherwise on last document closed it will exit).

When I click on a file in the project, the Untitled gets replaced with the document I chose.

I expected the Untitled stay.

Otherwise I have it only for the purpose of not making the editor exit.

Why we cannot have just an empty background kept instead, not the file?

I like the way it currently works as follows...

* Open EmEditor and there's an Untitled tab waiting for input (unless I had files open previously).
* Close all open documents and there's a blank Untitled file waiting for me to start typing.

Other than that, I have no current opinion. I use 8+ different editors depending on what I'm doing.

Edit: Rereading the original post, I realize now that this was about the Projects Plugin in particular. Please disregard my intrusion.