Tried a few times to run the System Disc Monthly script, and it crashes around the start of zone4.

I'm attaching a cropped version of the debug log, and the crash stack from the end of the log is:
15:28:48     Sorting the program hints
15:28:48 I have crashed in function 'DefragThread' in source '.\MyDefrag.cpp' on line 52.
  Exception: ACCESS_VIOLATION (the memory could not be read or written)
  Command line: "C:\Program Files\MyDefrag v4.3.1\MyDefrag.exe"
  Context is not locked.
  1. At line 142 in 'd:\www.mydefrag.com\sources\lib\programhints.cpp'
  2. At line 311 in 'd:\www.mydefrag.com\sources\lib\programhints.cpp'
  3. At line 2485 in 'd:\www.mydefrag.com\sources\lib\interpret.cpp'
  4. At line 44 in 'd:\www.mydefrag.com\sources\lib\interpret.cpp'
  5. At line 1267 in 'd:\www.mydefrag.com\sources\lib\interpret.cpp'
  6. At line 44 in 'd:\www.mydefrag.com\sources\lib\interpret.cpp'
  7. At line 4766 in 'd:\www.mydefrag.com\sources\lib\interpret.cpp'
Trying to crash the other threads for debugging purposes....
15:28:49     Stopping....