Sets the time interval that spec files are checked for updates.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 2 | 
| 
 0  | 
Checks for spec file updates only when the drawing loads | 
| 
 1-4  | 
Sets the time interval (in hours) that spec files are checked for updates. The first check is made when the drawing loads |