The reason why the Release Candidate is slower than the freeware one, is because it inserts a watermark on your output (Demo Mode).
When purchased, it's as fast if not faster than the old freeware one.
Here's what changed since the freeware version:
Quote:DivxToDVD 1.99.13 :
- fix a problem with more than 1 subtitle per title
DivxToDVD 1.99.12 :
* Fixed a crash when reading some subtitles files that left DivXtoDVD non-responsive
* Added definition of font/color/size/style on a per subtitle channel basis (select the subtitle channel in the tree and click once ...)
* Fixed issue on subtitles color (Red and Blue component was exchanged)
* Fixed issue with word wrapping on long subtitle lines.
Version 1.99.11 - Major pre-release.
* Added subtitles support (srt format) - up to 32 subtitles channels, switchable on dvd
* Added language definition for all audio/subtitles tracks
* fixed engine issues for improved playability (smoother video, fixes audio problems, fixes timing (shaky video) problem, fixes chapters problem, ...)
* improved preview window, now previewing up to 30 fps
* user interface totally redesigned, with full support of drag/drop operations and dockable panels
* integration of a burning engine based on VSO burning SDK
* Shareware - the trial version add a watermark on the video and run half the speed of the registered version
* Lot of settings added - min/avg/max bitrate, font for the subtitles, target size, include originals on dvd, burn after conversion, ...
If you are pleased with the freeware version, feel free to use it.
I had a few videos that didn't work with the freeware version, that are now fixed in the Shareware one.