Yes, they are developing a brand new multi-platform implementation of Chess Openings Wizard which should be out within a few months.
Chess Openings Wizard (Bookup)

Thanks, James. Mike Leahy, the developer, has not answered the several phone numbers I have for him, nor his email. I have Bookup 2000 Express. After 5 1/2 years of use it has reverted to the "Lite" or trial version, which does not save moves one enters manually. It will not accept the "permanent" registration code Mike gave me when I purchased it. So I ordered a copy of Chess Openings Wizard Express from Amazon.
nor does he answer his email.
Sorry to hear about your experience. I recently e-mailed him at "mike@bookupmembers.com" and got a reply the same day. I also got the impression of him looking after customers. Sorry if this doesn't help your case much.

Mike Leahy/Bookup has surfaced and has kindly sent me a registration code for Chess Openings Wizard that works. Perhaps the fault has been mine in trying to sort through the various addresses I found for Mike/Bookup.
Warning: Do not buy Chess Openings Wizard from Amazon. They are selling an old build that depends on an obsolete copy protection code. The registration key in the CD package does not work.
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