French Kiss Textures and elements are compatible with Photoshop, Photoshop Elements and any other image editing software that supports layers, such as Paint Shop Pro, Affinity, Procreate, Illustrator and others. They work on both Mac and PC platforms
The textures are high resolution jpg files. My legacy textures are 5184 x 3456 at 300 DPI (ppi). Textures are now available at 6048 x 4032 at 300 DPI (ppi). Some textures are even larger.
Overlays are usually .png files which are also compatible with most image editing software. (Note: for Lightroom 4 and below, you will need to convert the files to Photoshop if you wish to import them into Lightroom.) Read more about overlays here. Aperture supports .png files.
Some files that require layers, such as templates will be layered Tiff files, which compatible with any image editing software that supports layers. Photoshop, Photoshop Elements, etc.
Brushes are compatible with Photoshop CS2 and above and Elements 6 and above except in a few cases that are Photoshop CS6 and above, which are clearly indicated. Some brushes have the option of the CS6 and above version which will have larger sized brushes than the CS2 and above versions.
If you need the PNG files for other versions or software not listed above, I recommend the following software for PNG extraction: the free app ABRMate for PC users or the modestly priced Brush Pilot for Mac users.
File size and format details are included in every product description