Not sure about the color profile settings, but when I notice the gamma is off when I open it in QT I go to Window > Movie Properties, select the Video Track, then click the Visual Settings tab. On the Transparency dropdown, select Blend. Ramp it up to 100%. Then set Transparency to Straight Alpha. You can now close the dialog. Hit Play and you should notice it looks more like the original AE comp. Save and you're done!