This question is easy to answer.
All you would have had to do is do the following:
• Log into your account
• Read through the latest announcement (which is visible at the landing page after login)
• See that we rolled a backup
• Get the information how to 'restore' your old thread from the announcement
• PM me once you created the new thread so I can upgrade it for free
So you see, it's an very easy explanation (once you checked through the announcement).
You can restore your old first-post-code from here (You will get information on how to access this thread from within our announcement)
With that please create a new thread and do! not! upgrade! your thread manually, instead PM me with the new link to your thread and I will do it.
I think that will solve all your issues.
Best regards, Tracky