SWX xDesign Save Issue

Dear community,

it seems that I have an issue in my design done with xDesign that prevents me from saving. After long time of investigation I decided to skip my changes and return to my last saved version (not revision, just last successful saving in "in work" maturity). Even after clearing browser cache it still opens the design with the saving issue status.

I'm using xDesign for Students on MacBook Pro Safari browser.

Is it a bug or can anybody give me a solution?

Thanks in advance

Hendrik