Tikiman,
If Mint 17 is behaving itself then there is no real need to upgrade to 17.1.
If you do decide to do the upgrade, then follow the advice here:
http://lmelinux.net/2014/12/05/upgra...-mint-17-17-1/
and always do a backup of personal data, including all documents, pictures, bookmarks etc and email folder (if applicable).
The alternative is to do a fresh installation of 17.1, after doing a backup.