I recently upgraded and now when I import my video clips, I get a message:

The following file can only be played smoothly on fast systems.

If your system is too slow, please click on convert.  The file will then be converted into a format that can be played better.  

If I convert it, it takes forever - 5-10 - minutes to convert it from a .mov file to a mpeg2 file.  If ignore, than it does noting.  

This was not the case in my previous Magix Movie Edit Pro 17.