[CrashOver1D]

Hi, new around, first post :-)

I'm curently moving from a Netgear NeoTV to a real HTPC for my multimedia needs on main TV
Done a fresh install of Windows 8.1 on an Intel NUC D54250WYK, all drivers install and all updates ok
Install XBMC, set some params (MySQL database on a Synology NAS and some language params), all running perfect like on my main PC used to create all the databases before I received the NUC

Now I'm start for the real "HTPC" part and install XBMCLauncher, but I have a problem with the "Open Metro UI on XBMC exit" option.
I've tried both scenarios with Shell explorer / XBMC :

1) Shell Explorer
Work as wanted, if I closed XBMC, desktop pop and shortly Metro UI appears, good but with explorer as Shell, I can see desktop at startup, I try to avoid this ^^
--> So, try the second option

2) Shell XBMC
I've got a first problem, XBMC somtimes start without my profile, as a fresh new XBMC (without databases)
It seems I solved this issue by adding the timer before XBMC start (at 10s)
But now I can't manage to go back to Metro UI when I close XBMC, I'm always back to desktop ... even if I unckeck the option for starting explorer at XMBC close !?!

I don't really understand why it's happening, and even how it's possible ?
Any ideas ?