I'm looking for a Windows PDF viewer that allows you to rename a file while it is being viewed.
The software can technically be a PDF viewer or editor; it doesn't matter. All that is important is that it can quickly view a PDF file and allow me to rename it while it is still open.
I've tried the otherwise-excellent PDF-XChange Editor, but it does not currently have this functionality.
I prefer gratis, portable, open-source software, but none are requirements.
The cost must be less than about 10 euros/dollars.