You can use the PNG leaves in any program that allows you to work with layers and blend modes.
The bonus actions will only work in photoshop. Use on computer/laptop Mac or Windows with Photoshop versions:
Not compatible with Photoshop Elements or older versions of Photoshop. Not compatible with Lightroom, mobile or tablet. BUT you can easily apply by hand using these programs. The tutorial shows you how. The actions are just a bonus :)
• Get a free trial of Photoshop Creative Cloud here: Get Adobe Creative Cloud