While the software is no longer officially sold, you can still find community-made styles and project templates for free through these channels:
But for new users, consider modern alternatives that offer built-in style marketplaces (many free): style proshow producer free download
Before diving into downloads, let’s clarify the terminology. In ProShow Producer, a style is a pre-configured set of layer effects, motion, and transitions. Unlike templates (which build the entire show), styles apply to individual slides or layers. While the software is no longer officially sold,
– 50 smooth zoom/rotate styles. Source: CreativeFreedom free section. style proshow producer free download
– Soft focus, light leaks, and slow pans. Source: Archive.org – "ProShow Legacy Styles 2019."