We've recently been getting bug reports of not being able to select items from drop-down boxes on the job screen (and others) when using high-res monitors and/or high DPI settings.

The next maintenance release of HelpMaster will correct this issue.  In the meantime, as a work-around, there are a couple of options.

1. Adjust the DPI settings for the monitor that you're using HelpMaster on to use 100%
2. Use the the keyboard to select items in the drop-down boxes