I have been looking for this program all over Google and I am sure it is there. There may even be more than one. I have so many of these tools gathered over the years I may already even have it. 
The way it worked was that if you selected a lines of text that was a registry key (HKCU or HkeyCurrent User etc ) then right clicked your selection, you had the option to open reg-edit or another registry editor at the location of the text you had highlighted. It seems it may have even worked to the level of searching for words or text wherever it appeared it int registry but the best part was being able to jump right to the key that needed to be edited without having to scroll for it.
I used it to clean up a few systems several years back where a virus had made specific changes to several registry keys and with this kind of search ability it was easy to locate the keys I knew of as well as find those that I did not yet know about as they all had similar changes made to them. I could either search for the key or search for the change and it was extremely fast.
UPDATE: I located this from searching DC history. Have not yet read the whole thread and it may lead me to the answer.
Http://www.donationcoder.com/forum/index.php?topic=38449.msg359829#msg359829
Apparently, back in 2014 I had already been on DC looking for this same tool.
Further update: Apparently not. This was on a similar but different topic.

The way it worked was that if you selected a lines of text that was a registry key (HKCU or HkeyCurrent User etc ) then right clicked your selection, you had the option to open reg-edit or another registry editor at the location of the text you had highlighted. It seems it may have even worked to the level of searching for words or text wherever it appeared it int registry but the best part was being able to jump right to the key that needed to be edited without having to scroll for it.
I used it to clean up a few systems several years back where a virus had made specific changes to several registry keys and with this kind of search ability it was easy to locate the keys I knew of as well as find those that I did not yet know about as they all had similar changes made to them. I could either search for the key or search for the change and it was extremely fast.
UPDATE: I located this from searching DC history. Have not yet read the whole thread and it may lead me to the answer.
Http://www.donationcoder.com/forum/index.php?topic=38449.msg359829#msg359829
Apparently, back in 2014 I had already been on DC looking for this same tool.
Further update: Apparently not. This was on a similar but different topic.





Updated to the latest. This sounds like what you want. Select a reg key text and hit a hotkey to open regedit there.