Here you can see what is new in various versions of CPN Tools and Access/CPN and which versions of Access/CPN works with which versions of CPN Tools. The list is not necessarily comprehensive, but lists the major changes.
The list may also reflect features in versions of CPN Tools that have not yet been publicly released, and as such reflects changes that are currently in the source repository but have not yet been deemed important enough to make a general release.
ONLY USE THIS VERSON TO TEST SIMULATOR EXTENSIONS It does not yet gracefully degrade if you don't! You will not be able to create nets without extensions, and extensions are not yet optimized, making this version seem significantly slower.
Use new experimental feature of SML/NJ which provides improved error messages.
Fixed bug sometimes causing the first declaration to appear unchecked (and having some consequences when making certain edits). If you haven't encountered any obscure problems, this did not affect you.