How do I install Download Manager on my PC? Daniel Brown Updated October 16, 2017 22:56 Follow Go to My Library on the Cineplex Store website, and click on Watch Offline. Follow the on-screen instructions. Related articles How do I watch movies offline (without an internet connection)? How do I install Download Manager on my Mac? What is Silverlight? My Cineplex Download Manager has an error that I must reinstall my video player. What do I do? My web browser is saying my system is not compatible.