How do I keep my Juno-106 Patches?

Before beginning the hardware upgrade, you should download Vyzex Kiwi-106 from http://kiwi-106.com/software.

Vyzex Kiwi-106 can understand original Juno-106 patch dumps and will automatically convert them to Kiwi-106 format: Simply install the editor to your PC or Mac, connect your stock Juno-106 via a quality MIDI interface and set the MIDI switch on the back of the Juno-106 to position III (SysEx transmit mode). Once the editor is connected, any patch selected from the Juno-106 front panel will be imported to the current patch in the Kiwi-106 editor, and can be automatically stored to any of the Kiwi-106 editor's GROUP locations.

See http://kiwi-106.com/content/packrats-patches-conversion, starting at time 1:26 for a good explanation and demonstration of the process.