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If it is a good software - of course it works. It depends for what reason you are using it. I'm using ProteMac Logon Key programm. It works well) (www.protemac.com)
Chroma key photography is where the subject is photographed in front of a solid-color background -- usually green or blue -- that can easily be removed in post-processing using a program like...
No, every copy of the software has an unique code that is matched by the software's disk. You cannot change the inscription on the disk, thus you cannot change the product code.