The following is a step by step if you want to run an specific version of Flutter within a project.

First choose the version you would like to install and cache on your machine.

This will install version 1.17.4 and cache locally.

> fvm install 1.17.4

Go into the project directory

> cd path/to/project

Set the project to use the version that you have installed.

> fvm use 1.17.4