I've been running PortableApps for years, and Blender on it as well with no problems.
Then PortableApps updated, including Blender, and on the first run I got a message about being onWindows 7 (which I am not and that there was a legacy app available for Windows 7.
Mousing over the Blender item in the PortableApps menu, it showed as 2.93.2 as expected, but when Blender started it was 2.80!
Any way I uninstalled and reinstalled a few times, with no change in result.
So I uninstalled and then got the .paf directly from the PortableApss/Blender page and asked PortableApps to install the .paf from the PortableApps menu.
After that again the mouseover hint on Blender in the PortableApps menu shows 2.93.2 as expeceted, but 2.80 opens up!
So having observed the .paf install in detail I had notinced that there was a 64bit directory receiving install files, so I had a look and true enough there were two apps under APP
(with a 2.80)
(with a 2.93)
And as expected under Win 8.1 64bit
runs just fine if started directly.
So somethng has broken in the menu in choosing what app is run?
The mouseover hint shows Blender 2.93.2 but clciking starts 2.80!
Any help please?