Undo XPe to ThinOS conversion = security key problems when imaging

 Undo XPe to ThinOS conversion = security key problems when imaging

Hi all. New to the forums as hunting for some information.

I have a load of Wyse R90L's which have been converted using the Rx0L ThinOS Conversion kit and I was wondering if it was possible to revert them back to their original XPe image?

I have tried just using the Wyse USB installer and a downloaded XPe image, but it says there is a security key issue (no matter which image I use). So does anyone know how I could do it?

Thanks!