I read over what was posted by the developer and others on that link you provided.
If the reason is due to simultaneous updating.
As long as you DO NOT save the file, it does not update the file.
I have opened many folders and never edited, just copied out information, and the file date never changed.
Being a developer myself, I can say for certain, that the only way a file is updated, is during the saving process.
I'll second this. There are so, so, SO many times I need to see how some other files are tagged, but don't want to close my current "working" files. I would love a "read-only" second instance. It can even have a popup that warns read only.
Yes, I know I can add or open more files to the current instance. I really don't want to do that, I often tag files a folder at a time, adding files just confuses the process.
A second instance solves all of these inter-related issues.