You bought AbelCam today, not yesterday. You could have tried the program before spending anything.
Thank you for your purchase
Blame Micro$oft for changing so much between versions - Autostart creates a registry entry which does not seem to work on Windows 7.
You can just create a link in the autostart program menu to start AbelCam when logging in.
To hide the program completely, add the Parameter /hide
-> link to create is c:\program files\AbelCam\AbelCam.exe /hide