"[...] did not close properly last time it was run and ...
Moderator Note: This topic is outdated. The PortableApps.com Platform gained the ability to automatically close apps in 2014. Details on how to enable this feature, how to avoid the error message, and how it will be addressed further in the future are included on this support page: https://portableapps.com/support/portable_app#didnotcloseproperly
..will now clean up. Please then start [...] again manually."