You need to be very careful messing with firmware mods if you don't understand the basics. I've said a couple of times about the device details appearing in the window next to 'USB Device' of Updater's GUI indicating that it's in preboot [because you can only start the flash then]. Now you're asking about RGN_Tool not seeing your Edge. That's used to open GCD and RGN files and their BIN file components, it has nothing to do with the unit directly and doesn't connect to any Garmin device. Why are you asking about RGN_Tool now? Are you expecting that it can somehow 'backup my current version'? Your current version is the bog-standard Edge 1000 Explore firmware Version 3.00 available from several sources:
Code:
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Read my previous comment about why you should use the 'hybrid' firmware i've supplied, which is Edge 1000 Explore boot.bin combined with remaining firmware from Edge 1000 and has been modified to retain the Explore's HWID but will hopefully work to boot and run the explore as a 1000, and importantly will enable an easy flash back to Explore if there's a problem [because we haven't changed the unit's HWID [hardware identification number].

Please only keep going when you've got your head around this. Only then can you make an informed decision about any risk, which increases exponentially and inversely to the operator's knowledge. With some basic knowledge the risk is very small indeed. My concern is that quite obviously you're yet to grasp the basics of course.