Rocky,
Are you looking to install Laravel Extensions to CodeMix? If yes, then you can download the .vsix file for the Laravel extensions and install it from Help > CodeMix Extensions > Install from VSIX file button. Browse to the downloaded .vsix file and reload the CodeMix engine when it prompts to complete the installation.
Hope this helps. Please let us know if you have any further questions.
–Swapna
Genuitec Support