How can I unlink my crowd flower account from Clixsense account?
Thank you

Try this: Run CrowdFlower without ClixSense running. Or, use two computers, one running CrowdFlower and one running ClixSense.
(Note: I have not tried this. (I crowdflowered a bit over at bezo's site and it didn't play well.) Here's my only experience with CrowdFlower through ClixSense: Can't enter into CrowdFlower -- post#5 | ClixSense Forum.)