From TinyMVC Documentation
Inside the distribution, you will find the following file structure:
/htdocs/ index.php /tinymvc/ /myapp/ /myfiles/ /sysfiles/
This contains the files you should place into your web doc root, which is index.php.
This is the main directory for your TinyMVC install. It is recommended to place this outside of the document root.
This directory contains all the files for your application. Typically, this is the only directory you will be adding and editing files.
This directory is only used in a shared installation. If you have multiple websites, you can share plugins between them by moving the plugin files from your /myapp/plugins/ directory into /myfiles/plugins/. Single and shared installations are explained in the Installation guide.
This is the TinyMVC system files. You should never have to edit these. When you upgrade TinyMVC, this is the directory that gets upgraded.