Exchange? Hmm, I would think this would be a copyright violation- but you should ask Alex to be sure. David
@pamphile: if you have purchased a license and are still within the supported time frame (6mo?) and will no longer use the plugin, you can mostly likely email aMember support and ask them to exchange it for a different plugin (or credit towards purchase of a different one). As far as exchanging/trading with other members.. I agree with David, this is a violation of the license.
Of course, giving out plugins it is license and copyright violation. Please contact us via helpdesk and we will be happy to help.