I have trilogi 5.32 installed on my pc. Today when I opened a .PC5 through trilogi program, I got a error message saying "file not found or it is not a valid trilogi file". I am very sure the file is a valid file since I created it days ago. Then I tried open those sample file come together with software, I got the same error message. However the only file I can open is "Demo-protected" file. Urgenly need your help to solve this problem!!!!