tip: #windows doesn't have `rehash` like i'm used to with `zsh`, but they have `refreshenv` which is similar in that it will refresh your environment variables if that's what you're looking for.
if you make an env variable change and don't want to -HUP yer shell if you don't have to, give that a whirl next time you're changing system environment variables for ollama or something. it was recommended to me as one of the #tips while installing ffmpeg via #choco pkg!