Actually It can easily be argued that that a file format created spacificly for a program is in fact a portion of that program and in that sense they did clearly state that "any portion of the program merged into or used in conjunction with another program will continue to be the property of the company." that was in you P4 EULA. but the fact is that this is legaleze to protect their buts from the whole program being reverse engineered and they would be stupid not to protect their rights, they are no more likely to sue anyone creating helper aps then anyone else with similar patants and copywrites such as PDF, DOC, etc.