Not sure what version you are using, but you can try this:
1. If the Internet Palette is docked with the other Palettes, grab it by it's tab, and drag it out on the the TC Desktop.
2. Close the Internet Palette by clicking on the x.
3. If you are using the Standard UI, make sure you have save Desktop on exit checked under Options:General. If your not using the Standard UI... disregard.
4. Save to a new config file under Customize:Options... use a new name.
5. Close TC and reopen... and see if this worked.
6. If not...