Frosty_B5

I am using videopad 4.08 and my exported video is very laggy and tends to freeze alot. The orginal file is a smooth 30 frames per second, so its something that videopad does. I was wondering if anyone can help me, ive seen others post about this bug. I contacted NCH through email to try and get the 4.0 setup as i saw in another post this bug only affects 4.05 and 08. Thank you.