This problem can usually be fixed by deleting the Spindle Control folder in the registry. To do so:
1) Click the Start button, type “regedit” into the Search window, and hit Enter to open up the registry editor. Click yes when asked “Do you want to allow the following program to make changes to this computer”.
2) Navigate to the folder HKEY_CURRENT_USER\Software\VB and VBA Program Settings\ShopBot\Virtual Tools
3) Delete the folder – Spindle Control by right clicking on it and selecting delete. This folder will be recreated and populated with the correct settings the next time the Spindle RPM Controller is opened.

