Try going to your C drive and then 'Program Files'. Find the folder that says 'Sony'. Inside of that find the 'Shared Plug-Ins' folder. Inside of that find the "Utilities' folder. Inside of that find the 'Migration Tools' folder. In this folder, read the 'SF2Sony_readme.htm' file. This should help.
Sorry Nick but I think you're going to have to re-do them from scratch.
I vaguely recall an old post saying that this information was buried in the registry somewhere, meaning that it's not readily accessible.
jr, thank you very very much for posting that!!
I am now a happy editor knowing that there is a way to copy the many presets I have on various machines.