For Magento 1:

To uninstall this extension, please log-in to your Magento Admin Panel

1. Go to System → Magento Connect → Magento Connect Manager

2. Enter your Magento Connect Manager username and password 

3. Locate the extension you are uninstalling in the Magento Existing Extensions section

4. Select Uninstall in the column Actions

5. Click on Commit Changes and for the extension to be successfully removed

6. Click on Return to Admin

7. Go to System → Cache Management → Flush Magento Cache

For Magento 2:

Follow these steps to uninstall an IWD Agency Magento 2 extension:

1. Backup your web directory and store database

2. Remove all the extension files.

3. In SSH console of your server navigate to your store root folder:

cd path_to_the_store_root_folder

4. Run the following command:
php -f bin/magento setup:upgrade

5. Now run the following command:
php -f bin/magento setup:static-content:deploy

6. Flush store cache; log out from the backend and log in again