Yes you can do that.
– first create a “template” slide with one template picture on it.
– Set the display time to 5 seconds (it is important to do this before importing pictures, because after you will have to set it for every pictures)
– Then use the menu option “File / Import pictures in batch…”, choose the folder of pictures.
– Start the importation.
– Finally, use the menu option “Tools / Set random transitions” to set a random transition for every slides.
Check this tutorial for more details:
https://www.slide-effect.com/help/EN/create-a-simple-presentation.htm