4.6.2f1: Disabled buttons in Package Upload window

I'm trying to upload my assets in the asset store but something goes sideways in the package upload window:
It successfully downloads the list of assets I published but even after I select one the "Select assets folder" button is still disabled. The asset store tools plugin is up to date.

 

Tried it in unity 5 beta, same thing.

 

Have to do it this way:
http://forum.unity3d.com/threads/new-asset-store-tools-difficulty.296948/#post-1957434

 

Thank you!