Unzip the downloaded release, and change the name of the folder to `totalavtiveext`.
In the `ext` directory of your phpBB board, create a new directory named `dmzx` (if it does not already exist).
Copy the `totalavtiveext` folder to `/ext/dmzx/` if done correctly, you'll have the main extension class at (your forum root)/ext/dmzx/totalavtiveext/composer.json
Navigate in the ACP to `Customise -> Manage extensions`
Look for `Total Active Extensions` under the Disabled Extensions list, and click its `Enable` link.
Fatal error: Uncaught exception 'ReflectionException' with message 'Class dmzx\totalavtiveext\event\listener does not exist' in /home/fasteddie43612/public_html/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php:101 Stack trace: #0 /home/fasteddie43612/public_html/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php(101): ReflectionClass->__construct('dmzx\\totalavtiv...') #1 /home/fasteddie43612/public_html/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Compiler/Compiler.php(108): Symfony\Component\HttpKernel\DependencyInjection\RegisterListenersPass->process(Object(Symfony\Component\DependencyInjection\ContainerBuilder)) #2 /home/fasteddie43612/public_html/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/ContainerBuilder.php(576): Symfony\Component\DependencyInjection\Compiler\Compiler->compile(Object(Symfony\Component\DependencyInjection\ContainerBuilder)) #3 /home/fast in /home/fasteddie43612/public_html/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php on line 101
At this point I can do nothing, but thought i'd post this up encase there is a way to save it before I start all over!
Edit:
With help from Zardos, I got it back! just deleted the ext. and refreashed. Thanks dude!