Adobe AIR 3.2 may cause performance issues with ReadCube for some users running Windows.
Subsequent versions of Adobe AIR do not cause any performance issues with ReadCube. If you are currently a Windows user running AIR 3.2, ReadCube will prompt you to upgrade to the new version of AIR. If it does not, you may download and install the new version manually.
To upgrade to a newer version of AIR manually:
(1) Close ReadCube
(2) Download Adobe AIR (latest version), located at http://get.adobe.com/air/
(3) Install Adobe AIR
(4) Open ReadCube