| The white plastic cover is held on by something akin to molten rubber.
Probably some epoxy etc.
You should be able to grip it with point nosed pliers and remove it exposing the chip underneath.
Once its exposed you will see which way the chip goes in for replacement.
Dont run it for too long with the wrong chip.
I experienced this when I fitted the 50mm Termis and left the 45mm DP chip in.
Went on a DSC run round North Yorkshire and looked like I was on a Petronas in disguise.
Apparently the flames coming out of the exhaust were only over shadowed by the pops and bangs.
Got Nelly to fit my new JHP chip as part of the service and it ran and still runs a dream. | 
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