In March 2016, Microsoft patched a security issue to do with signed XML, which broke the way the Pedantis license system code worked. Signed XML documents such as the .pdk files that the Pedantis web site creates to hold test credits for the Pedantis software would not be read properly, resulting in an 'invalid key values' popup error.

To solve this issue, you will need to add new registry values. We've created the required files, which add the required keys to both the wow64 (32 bit on 64 bit windows) as well as the main 64 or 32 bit settings. These are included in the zip on the Pedantis download page.

To run the code, unzip the files to your desktop, then double click. You will get some Windows security warnings relating to registry changes; click through to accept and run the files. You should see a 'success' message from at least one of the files.

Once this is done, reboot your machine and try the Pedantis software again.