SSI Web writes some things to your computer's registry, such as the position of the windows, what size they are, etc. It's possible, though very rare, for an invalid value to be written to these areas, and the software doesn't display correctly. To fix this issue, you can delete the current settings for this area in the registry.
To get into the registry, click on your Start menu and select the Run option and type in regedit.exe. Find the following folder in the registry:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\Sawtooth Software\CiW\Write Questionnaire Dialog
Delete the registry entry "Write Questionnaire Dialog"
Please be very careful in the registry for Windows, many programs and system settings are stored there. Opening up the registry might require administrative access to your computer.