Hypersnap errors --> 30 screenshots lost

Dear all,
I would like to know if anybody can help me with the following problem:
I'm using Hypersnap 6 under Windows 7 for business use and today I made 30 screenshots of an application which were very important to me. Unfortunately the program had an error, the tool has closed and my screenshots were lost :(
 
Do you know any option to recover my lost screenshots?
 
What I've done so far:

• searched in temp files within \user\AppData\
• searched for temp files in the program folder of HyperSnap6
• contacted local support in my company

 
No success so far... Thanks in advance for your help!
 
 
Please provide this additional data: 
Exact HyperSnap version in use (from Help/About menu): ___6___ 
Windows version in use: __7__