If the prompt to choose between Basic and Standard scanning modes has been disabled follow the steps below:
1. In Laserfiche go to "Tools" then "Options".
2. The "Options" dialog box will appear. Click on "Reset".
3. Choose "Prompts".
4. Select "Scan Mode" from the list of Confirmations.
5. Click OK.
Took me awhile to find this, so wanted to save someone else the time.
Hope it helps.
Christine