There is no need to use DivX when you can use x264, a free open source h.264 codec that gives excellent quality. Note that h.264 is a proprietary standard, so hardware manufactures pay for it.

Also note that there are 15-30 converters and DVD rippers that are actively promoted by spam. Most of them are just complete clones except for names and logos, which are developed by the same Chinese company. The quality of these products is very low. Besides they don't support users or give refunds.

Also note that instead of converting videos (and thus losing quality) in many cases you can remux them. For example, you can extract h.264 video and AAC audio from h.264/AAC .mkv file and put them into .MP4 file without losing quality and lots of time. Of course not all players will be able to play such videos, but it is highly recommended to avoid re-compression where possible.

And don't use software from spammers. Most programs these days have free trials, so at least test "recommended" programs before buying.