The current platform has host many outdated applications.. Is this of sole user-submitted/managed PApps's [app]'s responsability to update these, or does PApps.com's moderator have a say in which version should be reported as current or not?
I would suggest the PortableApps Update engine to provide an additional version detection+notification module. One that would check versions of installed apps against both the PApps.com plateform's version, AND that of the apps's original publisher-released version.
[Current behavior] Checking for updates ('Apps -> Check for Updates') only perform version lookup against user's locally installed apps, versus those on PApps.com's. When both match, PApps output a "All Up-to-date" message to user.
[Desired behavior] Checking for updates ('Apps -> Check for Updates') performs 2 version lookups before outputing any result. It still perform versions lookup against user's locally installed apps and those from the PApps.com's base, but perfrom another lookup against original publisher's version as well. Only then, PApps out a result message to users, indicating the version state against PApps's platform AND original publisher's.