On x86 you can’t update from v2 to v3, for technical reasons.
This would not have made a big difference to your installation, even with an update you would have lost the contents INTERNAL.
The best thing you can do is to backup the contents of INTERNAL.
Once you verified the backup, flash V3 to a USB device and boot from it.
No need to go through the wizard (unless you wish to configure the USB device). You can close, go to the System menu and choose InstallToDisk to copy Volumio to the internal HDD (takes up to a minute).
Reboot from HDD, configure and restore to INTERNAL.
Your WiFi connection should also be fixed with Volumio 3.
Your Virtuoso subscription will still be valid, you can continue to use it as long as you wish.