Can't redownload launcher

So I went to open the launcher and it tried to update but it said that it couldn't update it. I did some searching and decided to uninstall and reinstall. Now I'm trying to reinstall it but now it says that I don't have enough disk space available when I have 691 GB of disk space and I've cleaned about 50GB of space prior to this. Does anyone know what the problem is and how to solve it?