Unknown Software exception error when launching Thinapp for the first time

I'm trying to Thinapp Ultraedit 17 and the application itself works fine, but when I launch the app for the first time or delete the Sandbox/restart the app, I get the following error

The exception unknown software exception (0xc0000417) occured in the application at location 0x01588bcf

Once I click OK, the application starts/runs fine

Built Thinapp on XP clean machine

Attempting to run Thinapp on XP SP3 O/S

Using Thinapp 4.6.1 to build app

App runs fine on Windows 7 with no error messages

any assistance would be great

thanks.