There was a small problem in NeoTweak XP 0.8 Beta that disables the ability to right click on your desktop or explorer. This was due to a small coding error (that has been fixed in NeoTweak XP 0.9). This problem will NOT go away if you have previously used 0.8 and upgraded to 0.9. This problem will NOT occur if you use NeoTweak XP 0.9 (and above).
To fix this problem, go to the "Desktop Tweaks" section and enable the option for "Enable Desktop Context Menus" and save the changes. After you reboot, all should be well. I deeply regret any inconveniences that may have been caused by using NeoTweak XP.