Need an option to downgrade for older devices

Recently updated to Airbeam 2.0 on my MacBook Pro but the 2 devices I use as remote cameras are a Ipad 2 and a Iphone 4 both of which are running IOS 7.2 and were working great.
Now I need to update to IOS 8.4 to use them as Cameras.

Would love to be able to downgrade teh application back to 1.5.2.

Please supply a link for this. I paid for this app over a year ago and now its free and thers a pro version that costs 4 dollars why dont the people wjo paid for this app get to upgarde for free?

I would rate 1.5.2 Version with 5 Stars teh new 2.0 Not too happy with the app make it usable with IOS 7 or provide a downgrade option Please

Monkeyspank22 about AirBeam