For MANUAL click removal, I use WaveRepair. It's very easy to use, once you're past the "learning curve", and they have a free 30 day trial:
http://www.delback.co.uk/wavrep/
WaveRepairs's AUTOMATIC click removal functions are not that great, though. For automatic, I've been meaning to give this one a try (but haven't yet):
http://www.wavecor.co.uk/