In an attempt to speed up indexing, I attempted to exclude the node_modules library root (this is from Angular CLI). Now the app doesn't work because it "cannot find module systemjs-builder." This is a directory within the node_modules library root. When excluding other directories, I can un-exclude them by right-clicking on them and selecting "Mark Directory As...Cancel Exclusion." There is no such option when I right-click on node_modules library root any more. In fact, there is no "Mark Directory As..." at all any more. What have I done and how can I fix it? The code is here: https://github.com/mrmikemcguire/NG2-Udemy-CLI.