The source-code file it produces may be used on a platform other than that which runs Dimensional Generator, without loss of precision.
The previous restriction on Kind specifications is no longer imposed. The source code that Dimensional Generator generates will use Kind specifications appropriate to it, and to the precision that you have specified. However, if the your program works to a precision higher than 15 decimal digits, then unit sizes must be specified as parameters or variables, not numbers, in the input file. See the manual accompanying the download, section 3.2.1, list item 3.3, second paragraph.
(Version 2.1 evolved into version 2.2 during beta testing.)
It supports the operand Mask (but not Dim) in the intrinsic functions MaxVal, MinVal, and Sum.
It includes slightly more comments in the output. In particular, it includes the number, for each type, that is used in the names of its specific functions and subroutines.
It permits more than one letter in the input of intrinsic type, e.g. the full word Integer, although its output depends only on the first letter of that specification.