I found these directions for removing Intellisync at Pumatech's website. The URL is
here. I don't know if it's a stable address though; if it comes up as a dead link then just do a knowledge base search for "uninstall" and it's the #1 result.
----
If you have followed the steps in Answer ID 1836 and Intellisync will not uninstall from your Pocket then:
On the device:
1. Tap on start->programs->File Explorer
2. In the upper left corner under the heading "File Explorer" tap on the down arrow icon and tap on My device.
3. Tap on the Windows folder, then tap on the StartUp folder
4. Tap and hold the "Start Up Intellisync" folder then choose the delete option in the resulting menu
5. Soft reset the device (equivalent to a reboot)
6. Now try removing the intellisync listing in the Remove programs icon (Start->Settings->System tab->Remove Programs). It may still give an error that it could not remove all files, but as long as it is removed from the list we can proceed.
If Intellisync still will not uninstall from the device, then a "Hard Reset" of the device may be necessary.