Suddenly webpart stops working

Feb 28 at 10:25 AM
Hello,
i have 2 times issue with the webpart. Every time i am able to fix it with adding new version of the filter to sharepoint.
But around every 3 months - half a year the filter stops working completely and i am required to remove the webpart and add the new version.

Am i understanding correctly that the webpart has somekind of license with it that only allows it to work for a certain time? How can i resolve the issue without being required to update the wsp, or does it happen every time new version is added to codeplex?
Mar 16 at 11:34 AM
Edited Mar 16 at 11:35 AM
Hi,
Happened again. Worked for 1 month and suddenly nothing.
Image

image link since embedding does not work: http://imgur.com/e4qcokA

Any clue what is happening!? the error comes up after i try to apply filter