You can uninstall the WinCollect agent from the command prompt.
You need to run the command prompt as an administrative user.
msiexec /x{1E933549-2407-4A06-8EC5-83313513AE4B} REMOVE_ALL_FILES=True /qn
msiexec /x{1E933549-2407-4A06-8EC5-83313513AE4B} REMOVE_ALL_FILES=False /qn