Make sure you have all of your clips on the hard drive for edit.
No external source.
You should be able to reverse one clip, produce that clip.
Repeat for each clip you want to reverse.
After you have the reversed clips, put all produced reversed clips on the timeline and produce the whole.
Once you have all clips produced into one video you can then burn your Disk.
Powerdirector may have trouble with too many power tools applied if your computer is underpowered.
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.