So here is the guide for that.
The module/extension which we install or create in magento can be enable/disable from admin side.
Now to enable/disable the magento module, login to your magento admin.
Go to System -> Configuration from header menu.
Then click on “Advanced” option of “Advanced” tab from left column.
Here you can see the list of all installed or created magento modules/extensions. And you can enable/disable them by selecting appropriate value from combo.