ultidev web app explorer stopped working
by giving this error pls give he the solution its too urgent

Description:
Stopped working

Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: uws.explorer.exe
Problem Signature 02: 1.0.0.18
Problem Signature 03: 506674a3
Problem Signature 04: mscorlib
Problem Signature 05: 2.0.0.0
Problem Signature 06: 47577b16
Problem Signature 07: 1295
Problem Signature 08: 14
Problem Signature 09: System.MissingMethodException
OS Version: 6.0.6001.2.1.0.272.7
Locale ID: 1033