Hi.  First time here.  My Toshiba W8.1 device became unstable.  While I research the best way to refresh/system restore it, I resort to using my XPSP3 laptop. Mainly for email and internet.
I expect to be using XP for an extended period.  I want to transfer Windows Live Mail messages and settings, which are stored in the registry. [HKCU\Software\Microsoft\Windows Live Mail\Rules\Mail].  I have backups of all my mail messages but I don't know how to retrieve the registry keys in the 8,1 device from within the WRE tools.  I doubt regedit is available.
I have been using Tweaking,com - Registry Backup v1.9.0 for both devices.  Here's my problem: I have the 8.1 reg backups on a USB drive.  I tried to get TRB to access the files, but it will only "see" the local path to restore.  I draw a blank.   

So is there a way to view and copy the registry keys I need, either with TRB or a third-party utility?
Off topic: this editor is the most feature-laden I've seen. (I've seen a lot since 1981)  
