====== Modify default project root for NetBeans ======
In Linux:

<code bash>cd ~/.netbeans/#.#/config/Preferences/org/netbeans/modules</code>

Finding the config folder in Windows can be a bit trickier. I located it here (your results may vary):

<code dos>cd "C:\Users\username\AppData\Roaming\NetBeans\#.#\config\Preferences\org\netbeans\modules"</code>

Edit the file. (I use vi. Adjust to use your editor of choice.)

<code bash>vi projectui.properties</code>

Then, modify the projectsFolder setting to whatever you prefer.