My recommendation? Go use a friend's PC.
Load the latest version of DM, backup the old BB for safety.
Then DON'T USE the Switch Device Wizard for this matter, it messes up your UMA settings in the new BB.
Rather, you will want to RESTORE certain items from the backup, to the new BB.
Read here, you would be starting from Step #4
WiFi on BlackBerrys- General Questions - BlackBerryFAQ
Good luck.