Looks like you have access directly to your server (localhost - WAMP server), I suggest to follow the official instructions from github.com (https://github.com/vqmod/vqmod/wiki/Installing-vQmod-on-OpenCart) or try to follow my instructions below
First, you need to uninstall the one that you did, just navigate to /admin/controller/extension/ => Delete (backup first) installer.php and modification.php => Rename installer.php.original to installer.php and rename modification.php.original to modification.php
Second, to install vQmod for OpenCart 2:
- Download v2.5.1-opencart.zip
- Unzip it, inside you will find a folder named "vqmod"
- FTP/Copy/Transfer "vqmod" folder to the root of your OpenCart installed folder (where you see: admin, catalog, image, system folders)
- Make sure vqmod folder is writable (I guess you don't need to do this with WAMP server)
- Then go to http://www.yoursite.com/vqmod/install - if you see a success message, then installation is done. If you see "index.php not writeable", then you need to set your root OpenCart index.php to writable. If you see "Administrator index.php not writeable", then make the "/Admin/index.php" to writable.
I believe for WAMP server (running under Windows), to make something writable = make sure that file don't have Read Only.
If you are not clear about something, just visit github page: https://github.com/vqmod/vqmod/wiki/Installing-vQmod-on-OpenCart
If you still have issue, post comments.