I have cards from a previous version of the software and I looked up converting them and when I looked to see if I had the required exe it did not exist in the programs installation folder.
What do I need to do to get this?
it should be located in your Documents folder under /OCTGN/OCTGN. if for some reason it isn't there you can run the installer and it will replace it.
just to be clear, that's the installer for OCTGN, there's only the one main installer available on the website which should install the main client and all the tools including o8build