The extension has 3 installation options: VSCode Marketplace, manual, and terminal.
Check the instructions for your preferred method, although we recomend the marketplace.
Because the extension depends on the freestlspserver executable, independently of your
installation choice, you will have to install the aformentioned executable by hand.
For this, you can either clone this git repository
and follow its instructions, or download and run
Visual Studio Code Marketplace
Search for FreeST LSP in the Extensions tab in VSCode.
Manual install from VSIX
Open the 'Extensions' tab of VSCode
Open 'Views and More Actions...' at the top
Select 'Install from VSIX...'
Choose the extension's .vsix file
You're all set!
Open a terminal of your choosing
Run the command code --install-extension <path to extension vsix>