To install the VoxMark plugin for Adobe After Effects, follow these steps:

1. Installation Path:
   - Windows: `C:\Program Files (x86)\Common Files\Adobe\CEP\extensions\`
   - Mac: `~/Library/Application Support/Adobe/CEP/extensions/`

2. Run "Add Keys.reg" on Windows, or "install-as-admin" on Mac.

3. Open After Effects preferences and enable:
   - Windows: `Edit` > `Preferences` > `Scripting & Expressions` (Check "Allow Scripts to Write Files and Access Network")
   - Mac: `After Effects CC` > `Preferences` > `Scripting & Expressions` (Check "Allow Scripts to Write Files and Access Network")

   For After Effects CC 2019.1 or later:
   - Windows: `Edit` > `Preferences` > `Scripting & Expressions` (Check "Allow Scripts to Write Files and Access Network")
   - Mac: `After Effects CC` > `Preferences` > `Scripting & Expressions` (Check "Allow Scripts to Write Files and Access Network")

4. Open After Effects, go to the ScriptUI Panel, and open "VoxMark".

Note: Ensure you have the API key ready as it is required for using the plugin.