1. On your Dashboard, choose Manage Workflows
or click on the following link: https://app.formworkflowplus.com/
2. Click on the spreadsheet to remove
3. Click on the bin, top right hand corner. This will remove the spreadsheet from your Dashboard and all related Requests. Your spreadsheet will still be accessible in your Drive.
The spreadsheet will reappear on the Dashboard, showing only new Form Workflow Plus requests, when a new Form is submitted for approval.