The Adobe PDF Library .NET interface is built on Microsoft.NET 2.0 (using the current Microsoft updates) and should be forward compatible for .NET 4.5.
The .NET interface will not run on .NET 1.0.
The Library Java Interface is built with JDK 1.5. It it not compatible with lower versions of the JDK. On the AIX platform, the supported JDK is 1.6.
Also note that while the Adobe PDF Library 32 bit releases can be run on 64 bit machines, a 32 bit APDFL application must run under a 32 bit JVM and the 64 bit release must run under a 64 bit JVM.