Wifi Button gone

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Hello,

I have an HTC Touch with WM6. I played a little bit around with it and installed some Wifi software like PeekPocket, Devicescape and WeFi. As I did not like WeFi and Devicescape I deinstalled them again.
Now my WiFi Button in the settings/connections tab is gone and I cannot connect to any network. I can turn the WiFi on and can use PeekPocket to scan for networks in my area but I cannot connect to them and the device is not automatically connecting to any free networks.
The Wireless Lan button is still there but does not help me with this issue.
I would like to check if all WiFi functionality was deinstalled but I don't know where to find the executables. In the Windows folder there seem to be none of them, so does anyone know what files are needed for the WiFi on WM6 or how I could get this button back?

Thx in advance.