Judging from what I see there are two Elasticque DLL files in the Band in a Box directory now the original file "dllelastiquePro.dll" and version 3 "dllelastiquePro3.dll".

If you really wanted to do some testing you could generate a few songs as is then rename dllelastiquePro3.dll to dllelastiquePro3.dxx and copy dllelastiquePro.dll to dllelastiquePro3.dll then generate the same songs and see if you can tell the difference.

Then copy dllelastiquePro3.dxx back to dllelastiquePro3.dll to get you back to normal.