Another question: I had an account on nabble. I think it was deleted with the forum... Yesterday I set up a new account with the same e-mail adress as before. Can i use my old forum with my new account?
There's not such a thing as an "account on Nabble".
Every forum is an independent entity.
So, in just the same way that you might use the same email address to register on Amazon and eBay and Gmail you may use the same email address on as many Nabble forums as you like.
The only restriction is that any one forum cannot have two registrations using the same address.
Once your forum is restored you will have the same ID (address and password) that you had registered before. That could be the same or different to the email address you used to register on Nabble Support.
Just a Volunteer Nabble Helper - because the nice folk at Nabble have helped me! GregHelp - Building a set of answers to Nabble FAQs.