Thanks for the info Atlas.
Just to make sure I've got it...
1. Unplug all the cables from the Xim,
2. hold down the pair button and plug into the pc (using the micro usb port yeah?),
3. wait for it to glow blue,
4. then release pair button,
5. then open the 20150816 firmware d/load (is this firmware actually the FlashTool I've read about btw?)
6. I should get an option to "restore factory defaults", this will wipe device and install 20150816
7. open up (previously installed) 20150816 manager on phone
8. <hopefully> be able to follow rest of OP

Thanks for the explicit instructions, Atlas. It just felt like there were some things/steps I was missing. Gonna try this now, and I think this was what I needed.
Only other question atm still remains, if anyone can answer please, the individual codes from RML in OP (the ones that come after the "all-in-one" code) for Hip, Ads, etc....are they contained "within" the "all-in-one"? So if there were something I didn't want with the all-in-one, I can just use the indi codes?
Thanks again in advance, appreciate the help.