Can't upload images within Galleries Image Store

A fresh install and try out of the Image Store plugin version 3.0.1.
The plugin looks great and i would really like to work with it within this WordPress Site, but i have the following problem:

I can’t upload any images. It creates the gallerie folder but doesnt upload the actual selected image(s) file within the folder. All rights on the gallerie upload folder are on 777. Within the plugin backend i can see the upload going to 100%, and i can see the published image info but i cant see the thumbnail? The file just isnt in the supposed upload folder?

I tried working with upload selected images and zip files.
Both wont work.

I am totally new within WordPress and this plugin so any help or tips would be great! I can make a user account if you wish to try out the plugin installed within my environment.

Many many thanks, hope you guys can help out.

Greets,
Shu