Carrera Fury 2010/2011 chainset upgrade advice

Looking to upgrade my Fury from a 9 speed X7 / X5 mix 11 to 32 cassette / triple truvativ Blaze 44,32,22 set up to a double. It currently has a truvativ powerspline BB so limited to cranksets without changing the Bottom bracket i assume. Looking to simplify my gears as hardly using the 44 now as bike being used as it should on proper trails not flat stuff. Kept dropping the chain off the granny gear when hitting the rough stuff at CyB and Llandegla this week, would be looking for a suitable bashguard to save my ankles as well. May look at slightly bigger top gear on cassette, managed most stuff whilst in wales until i was too knackered to pedal any more. Budget is tight so looking for easy options advice will be gratefully received.
Too many bikes according to Mrs O.
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