Tady má dokonce návodek, to umístění se může verze od verze drobně líšit.

Click Start --> run
Type in "regedit", and then click ENTER to open Windows Registry Editor.
Find out the below registry keys in the editor.
HKEY_CURRENT_USER\Software\TEC-IT TBarCode Office 10)
HKEY_LOCAL_MACHINE\Software\program name)
(HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Cur rentVersion\Run\eg ui)
Delete those registry keys by right clicking on them and select "delete".
Go to Start > Control penal > Folder > Select Show Hidden Files and Folders
Locate and delete the following folders manually if found:
(C:\Program Files\TEC-IT TBarCode Office 10)
(C:\Document and Settings\All Users\Application Data\program name)
(C:\Documents and Settings\%USER%\Application Data\program name)
Close registry editor and restart Your computer.