Updates for OEM versions, like CD-Maker 2000 Plus, are handled based on the agreement we have with each particular OEM. In some cases, they do not want us to provide updates and in others they want them. Anyway, we are not making new updates for version 5.x unless a particular OEM requests that of us. Your best bet is to upgrade to Version 6. The upgrade price from V5 Plus to V6 Platinum is $29.99 for the downloadable version.
I hope this answers your question.