@dave r said:

Patience. The author has always updated it in the past. I'm sure it'll get updated soon.

yes, version 12 which works until 10 april 2012 was released.
http://www.tensile-structures.de/sb_software.html

and taking system time back worked for me for last 2 days.

Soap Skin & Bubble expried yesterday. what to do?

but this expired again. can we modify anything to undo it?
(it says it expires on april 10th and today it's 11th)