To create a backup go to file menu > save copy
To open the wallet file after resinstallation you can use the file menu > open command.
I would have loved to know this before . I've kept a copy of the data that was in the Roaming folder, will I be able to keep the labels with it ?
Yep. That's exactly where it's stored:
http://docs.electrum.org/en/latest/faq.html#where-is-my-wallet-file-located
So all you have to do is restore the Roaming folder and install electrum. It should pick up your wallet file automatically.
Thank you for you help . I'll follow your instructions. Now that my question has been answered I'll lock my thread. Again, I say you a big thank you to everyone who helped me .