For yhe most part, Code-wise I would not be harmed by that. (We supply source code anyway so there are no secrets there.)
Market-wise I could see a fair bit of confusion as an old (now public domain) version floats around with the same name (but different version number) to the commercial version.
Of course this is likely immaterial anyway. Unless someone bothered to archive the version at the time, that version no longer exists. We can date it (from the release notes) but I no longer have that build in the archive.
