I tried to trim an MP4 file for 30 hours to post it on youtube and I cannot waste any more time. I paid for the NCH software but will remove it from my computer but must have a refund. I am a volunteer at a non-profit and can't pay for software I can't use. Thank you for understanding, Elaine Reber, ereber@***.com User's recommendation: Have a trial of software you never used before you pay for it. Can't pay for something that I can't use. Unemployed and 83 years old.