Thanks brantje for the info. Unfortunately for me I didn't have SSH originally enabled. I'm luckily back now(sort of), the only thing I seem to have lost are all my custom settings.
Here's what I did:
DSM6 chose fresh install - let this complete.
Once installed setup server with same name and user
Enabled SSH
Followed your steps for changing version file - the steps past this unfortunately did not work for me so I did the following:
Within DSM update and Restore I then chose the original pat file and installed this - worked fine
after above completed installed update 5 pat file
All good from now, all files intact, just need to make my customized changed now
Thanks again for pointing us in the right direction I feel relieved that the files are all still in place.