fungusware

I just upgraded to 2.6.11.0 and Windows won't open it. I get a popup message saying "a problem caused the program to stop working" and Windows closes the program. Here is the problem report:
Product
LojiklSweep

Problem
Stopped working

Date
7/28/2009 7:50 AM

Status
Report Sent

Description
Stopped working

Problem signature
Problem Event Name: CLR20r3
Problem Signature 01: lojiklsweep.exe
Problem Signature 02: 2.6.11.0
Problem Signature 03: 4a6ceecc
Problem Signature 04: LojiklSweep
Problem Signature 05: 2.6.11.0
Problem Signature 06: 4a6ceecc
Problem Signature 07: 23
Problem Signature 08: e9
Problem Signature 09: System.InvalidOperationException
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033

Extra information about the problem
Bucket ID: 662277602

Any ideas on how to fix? I ran this upgrade on another Vista computer and it ran OK.