After disabling it in Task Manager, does it still appear in Autoruns?
Is the checkbox in the tweaker's settings checked?
Have you checked the following branch?
HKEY_CURRENT_USER\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run

Yes, that's OK.
As I assumed, the tweaker runs twice. The second time it causes the main window to be shown.
Perhaps the Autoruns program can help you here: http://technet.microsoft.com/en-us/sysinternals/bb...
See if you can find a second instance of the tweaker.

OK, please try the following debug build:
https://www.dropbox.com/s/gbkmo3n2f4ht4pm/7tt_setu...

After installing it, a file with the name _DEBUG.LOG should appear on your desktop.
Remove it, restart your computer, and upload the _DEBUG.LOG file (which should be created again after you restart).

This should show whether the tweaker is being run more than once, and with which arguments.

Hmm, interesting.
Perhaps you have another instance of the tweaker running at startup? e.g. in the startup folder?

Also, could you try exiting the tweaker, and manually running it with the -hidewnd command line switch?
Is the main window being shown? It shouldn't, the tweaker should start minimized.

Please try v4.5.1.5 beta.

Already implemented with the list_reverse_order advanced option.

Clarification (from original mail):

Can tweaker tweak the order in which grouped items fall,
I hate the way that windows 7 puts the latest opened item at the bottom of the grouped list…

Xp was nicer I think because stuff is where you last left it, with newer items appearing at the top…

The tweaker should already start minimized. Please check the command line parameters in Task Manager:


It should end with "-hidewnd".

Not a bug of the tweaker.