I have a g4 imac which is supposed to be compatible with ijournal. I don't understand why I can't download. When I install the program into my computer, it does not open. Instead, I get an error message explaining that the program unexpectedly shut down. I suspect that it may have something to do with the requirement of Tiger compatibility and/or universal binary, but I have no way of knowing. How can I conclude which of the two is causing the problem?