Took me several try on two computers before I got an uncorrupted download. . Once I got it to work, it was not very untuitive - I could not figure out what the heck it was supposed to be doing. probably my fault not Chipmunks, but before I got the hang of it, I got a notice that the Demo had timed out, and that I had to buy the real version to use it any longer. Uhmm, there was no warning/notice in the description that it was a demo, and not a fully functioning, albiet shareware, program,, far less a demo that would quit after ten minutes! Not only that, but the pay-us-or-else screen then wouldn't go away - it just sat there with that stupid twirly thing turning, and locked up my computer - couldn't make it go away or force a quit, so I had to do a full restart.