In the previous versions of Toad, the right-click menu of Schema Browser Data tab included the "Import from Clipboard" menu option. This option is no longer available in Toad 10 versions.
The right-click menu options were changed in Toad 10 for consistency reasons. The same “import from clipboard” functionally can be found in Toad 10 from the left-side of Schema Browser as such:
1. Select the table name from left side of Schema Browser table names list and right-click on it
2. Select “Import Data” option
3. This option will open an Import Wizard window similar to the previous Toad.
4. The second pane of this wizard will have an option to import from “MS Windows Clipboard” option