Thanks you for buy this module before use this module must take backup of your store
any issue please contact us at email@example.com
No core file changes
1. Copy all files according to route of the files.
2. Does not overwrite any master files.
3. VQMOD must install.
4. Then place xml file in xml folder.
5. Then GO to admin panel and Go to System->Users->Users Group click edit of Top Administrator click on select all link of Access Permission: and Modify Permission: as well. After that click on save button.
6. Now for more details follow documentation file.