I am also a fan and longtime user of MoviePlus.
I was doing a Google search to see if anyone had copies of X6 for sale, apparently not. Wish Serif would add it to the $19.95 discontinued products for sale list. I have adopted Magix Movie Studio Platinum v15 (Vegas) as an alternative. It shares many common elements but MoviePlus seems friendlier with a more elegant user interface, in my opinion. There are lots of additional features in the Magix Studio suite - like producing 'movie' DVD's complete with DVD player compatible menuing systems and audio music production software, but it also retails for correspondingly more. I got lucky buying an older version of Vegas on a download for relatively cheap, then getting an upgrade offer of $99 when I registered the older Vegas v14 to upgrade to the Platiunum Suite v15 version. For near-studio quality video production, Vegas offers extra stuff and effects, etc. etc. but for knocking out a simple YouTube or short video to host on your website - MoviePlus offers a gentle learning curve and an easier path between step 1 and your objective; I still fire it up and use it for quick and dirty projects.