Thanks for the heads-up, Gary. Michal gave me a refund on X Builder, allowing me to purchase the discounted XWDP-X Builder bundle. So, I'm back in the Magix update service claws. ;-)
I agree that it's an interesting collaboration. It seems like a smart move by Magix. Xara should have offered such a deal. Perhaps also some bundle with XT-CMS. And they should have made their long-promised API available as well so that others could have developed add-ons and such.
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