You DON'T need rgn tool if you use pack below.

Do like this:

- First download and extract this on desktop of Pc

Spoiler:
http://www62.zippyshare.com/v/63700977/file.html


- now drag/drop rgn on updater.exe

- add dot beside USB in updater window

- connect nuvi with cable to Pc and when you see garmin logo quick press little above G and hold finger there

- in updater window you will see writen Blade series beside usb

- now quick click on OK button in updater window ( you have only 10 sec to hit OK button ) you must still hold screen

- after updater say that is finsif you can release finger from screen.