Or are they still selling the Windows port?

I wonder if there is a legal issue with the original version. It was published under another game company, and perhaps they don't have the right to sell that version due to the original publisher flash screen?

Unfortunately the new publisher flash screen isn't that great, it looks kinda unprofessional.

I emailed the dev and they said they have the rights to sell the DOS version, so I don't think it's that, but you might be right.

I more like the dos cd version than windows port.