If you accidentally deleted a report, you can find it in the Recycle Bin folder in the Reporting Dashboard of BI 4.2.
You can access the Reporting Dashboard by:
Through the Navigation Bar, select "Reports" then "ETO Results".
Clicking the Reporting icon in the top right of ETO
Once you are in the Reporting Dashboard, select the "Documents" tab.
After opening the "Documents" panel, you will see options for My Documents, Folders, Recycle Bin, and Search. Click the option for "Recycle Bin".
If a report was deleted within the last 30 days, you can restore the document from the Recycle Bin. Right click the name of the report, and select "Restore".
The report will return to the folder it was previously in before it was deleted.