First make sure you are using the newest release.
In 360 Publisher’s menu go to About -> Version. Click Check for update.

If the issue persists:
Go to the  Support tab at the very bottom of the menu.
Describe the issue. Feel free to attach a screenshot or screen-video.

Should you not be able to open the program, or access the menu
write to:
or call: +49 06103 – 37 27 494.