The extension replaces default behavior of product deleting. Instead of removing the product is being excluded from global catalog with further ability to restore the product or remove it permanently. Deleted products can be found in Admin -> Catalog -> Archived Products.
The extension is compatible with Magento 1.9 and Magento 2.0. It also might be compatible with earlier versions but compatibility has been tested only with versions listed below.
- Put all files in Magento root directory
- Clean cache
If you have compiler enabled in Magento 1.X, compiled files should be invalidated as well.