re-installing on a new hardrive

hi guys, i just put a new hardrive in my laptop and copied mixpad and wavepad from the old to the new

i re-activated them and it looked like both worked fine, untill i tried to edit a track on mixpad.

then instead of opening wavepad, it downloaded a new version. i have v3.05

now i'm not a pc boffin, so is there a way of actually re-installing wavepad on the new hardrive

(i copied it from the old hardrive to my flash memory)

or do i have to pay for a new version of the prgram, cos obviously i dont want to pay again lol

please any advice would be great

thanks guys

fender