Forums for discussing about these shaders can be found on our support forum page. Our support forums is reserved for people using our software with a trial or a commercial license.
Once you bought the software we send you a license file (.lic) valid for a given computer.
We need your hardware id (Mac address) to generate the license. If you did not already send it during the payment process, you can send it after the fact: start DL3DShowMAc, then copy/paste the result to an email for contact@dl3d.com.