For the ProThemes Pack / ProThemes Past Releases (May 2014 to February 2015):
Windows - the installer comes in a .exe format. You just double click on the .exe file and install the slides on the same directory where you installed VideoMakerFX (by default it's C://Program Files/VideoMakerFX).
MAC - Follow the instructions on the PDF guide from this link:
MAC - Follow the instructions on the PDF guide from this link:
For the ProThemes Monthly Membership (March 2015 onwards):
WINDOWS/MAC - Please follow the instructions on this link:
http://www.videomakerfx.com/tr/VMFX-1.1-SlideInstallation.pdf