the product downloads of the Glitch Bundle and the Cartoon Bundle contain a HOW_TO_INSTALL.pdf which explains this. You find the downloads of all products you purchased in the “My Downloads & Licenses” section of your aescripts customer account at https://aescripts.com/downloadable/customer/products/
Note that the extra bundles are only compatible with Squash & Stretch Pro, not with the free version.
If you have any issues with the installation, please open a support ticket and describe as detailed as possible what is not working
Bought the Pro version last week.
https://aescripts.com/downloadable/customer/products/