TCEXIT sometimes not called in TCMD

[TimButterfield]

I just noticed this when I installed 10.00.49 on a WinXP system.

If I use the system close or right-click the task bar and close, then TCEXIT is not getting called. If I type exit at the command prompt, TCEXIT is called as expected. It works the same in both WinXP and Win7Beta. This used to work in ver 9.02.

Tim