Explorer context menu opens up old version of Mp3tag

I installed the latest version (3.17) of Mp3tag, but if I use the explorer context menu, version 3.15 opens instead. Control panel only shows 3.17 installed.

What most likely happened is that you've installed the v3.17 version to a different folder than an existing v3.15 version.

I suggest uninstalling the version listed at the control panel (backup your settings and let the uninstaller keep them) and then remove what's left at either C:\Program Files and/or C:\Program Files (x86) manually.

After that, reinstall the latest version and all should be good.