After my notebook crashed the only disk I had handly was ubuntu mate 15.10. Software update tells me there’s no longer support for that version, so I will have to upgrade to 16.04.1 I wonder will I have problems with Wifi afterwards? I had LAN connection to do installation & updates / upgrade, but later network point will be no longer available, only wifi. If I do the upgrade, will I lose my wifi configuration, passwd, etc?