As usual, the .max file format was changed. 3ds Max can read files created by earlier releases, but those earlier versions cannot read files created by later versions of 3ds Max.

Files can be interchanged between 32-bit and 64-bit versions of 3ds Max, but with limitations:

• a plug-in not being available in x64 may cause problems
• a file created with a x64 could be too big for Win32, making it unloadable