Repro steps:
1. Create a new job, "Test-FSTrigger".
2. Configure a string Parameter "monitor", with value "c:\test".
3. Check the "[FSTrigger] - Monitor files", then click "Add file to monitor" and in the "File Path" text field, enter "$monitor".
4. In the "Schedule" text field, enter "* * * * *" so it will monitor every minute.
5. Save the job, and wait one minute. Then click on the "FSTrigger Files Log" link in the left menu.

Expected results:
It should have said the folder doesn't exist (and then I would create the folder, wait a minute to see what it said then; then create the file, and wait a minute to see it function).

Actual results:
It shows an error: "[ERROR] - Polling error The given pattern for the file to monitor must have a directory."