Flushing cache in Prestashop 1.4
Login to back-office and go to Preferences –> Performance –> Force compile and choose “Yes“.
This will generate new files and replace the old ones.
Once you’ve seen the new page, set the “Force compile” back to “No“.
Flushing cache in Prestashop 1.5
PS 1.5 follows a similar process, just that the settings are in a different place.
Login to admin area and go to Advanced Parameters –> Performance –> Force compile and choose Yes.
Once you see the new page, change this setting back to “No“.
Clearing cache in Prestashop 1.6 and Prestashop 1.7
Login to admin panel, and go to Advanced Parameters –> Performance –> Template compilation” and choose “Force compilation“.
Then in Cache choose “NO“.