Yeah, the x86 emulator probably doesn't support the APIs required for such programs; they're pretty obscure and surely weren't the dev's first priority. I really, really wish that tool's source code would be released so people could continue working on it...
Since you're on 8.0 (and already jailbroken, even) the question becomes "what open-source undelete utilities for Windows are available?" Typing "open source file undelete" into Bing gives http://kickassundelete.sourceforge.net/
as the first hit. What's more, it's entirely written in C#, as far as I can tell, even supports Mono. It might not even need to be recompiled and should be trivial to recompile if needed.
Obligatory reminder: Don't use the tablet (any more than absolutely necessary) until you have a chance to run the undelete tool. There's a pretty fair chance of the data getting overwritten, or even just getting TRIMmed out of the SSD, if you do so.
Win8/Windows RT projects:
List of desktop apps for hacked RT devices
Native Access WebServer and Libraries
WP8 Interop Unlocks
Storage Cleanup tool
XapHandler, Root Webserver, OEM Marketplace XAPs, Bookmarklets collection (Find On Page), Interop-unlock hacks.
Do not private message me with questions that should have been posted on the forum!
Not only are you wasting your time - I'm not going to bother writing an answer to such a question for only one person - but I will probably block you from PMing me in the future as well.