I have been using mp3tag for some years on XP, Vista, and Win 7 (64) machines. Just got a new computer with Win 8.1 on it. Installed mp3 tag successfully. Used it for the first time and it works fine. I forgot one of the formats for a tag conversion name, so I clicked on help (and subsequently also tried F1 and tools menu) and I get a dialog (it looks like it's from the "new" side of windows) which says "no apps are installed to open this type of link (file). Try the app store".
When I navigate to the help files in C:/Program Files/mp3tag/help... etc and double click one, it launches correctly in my default browser (which is chrome for me). The URL is file:///C:/Program Files... etc. So there is code in mp3tag to use this File URL construct. And Chrome obviously accepts it by typing or double clicking on the help html file. But it won't launch from inside the pgm.
I really think this is a Windows problem, but I can't find anything on the internet about it. When I go to look in the associations control panel item, there are lots of URL type protocols, but none that say File. There is an FTP but I know that's different. I know you aren't Windows Support, but do you know how to fix this? Or is mp3tag not compatible with Windows 8.1? The rest of it seems to work for what I do.
I also found something about Chrome not letting one do the File url from an https: site, but this is not across the internet. This is local. AND it works on my Win 7 and Win xp machines with the same version of mp3tag and using Chrome as the browser. So the culprit appears to be Win 8.1.
I know this is long, but I tried to be as concise as possible and tell you all the things I DID try and the things I suspect it ISN'T, and why.
I can get around the problem by navigating to the help files and double clicking, but it's not very elegant. If there's a little change that could keep Win 8.1 happy, perhaps it would be worth it.
Thanks very much.