Please read the following precautions carefully before uninstalling ScanSnap Manager.
When installing ScanSnap Home version 3.0 or later, you need to uninstall ScanSnap Manager because you cannot use both applications at the same time.
Precautions
1. Some legacy ScanSnap models will no longer work
ScanSnap Home does not support some legacy ScanSnap models such as the S1500 or S1300. If you uninstall ScanSnap Manager, you will no longer be able to use these legacy models.
Before uninstalling ScanSnap Manager, make sure to check here 
to confirm whether your ScanSnap model is supported by ScanSnap Home.
2. ScanSnap Manager cannot be installed again
Support for ScanSnap Manager has already ended, and its installer is no longer available for download. Once you uninstall ScanSnap Manager, you cannot reinstall it.
If you have the following software installed and you want to continue using ScanSnap Manager as the scanner driver, do not uninstall ScanSnap Manager. In this case, ScanSnap Home version 3.0 or later cannot be used at the same time.
- ScanSnap Home version 1.x or 2.x
- ScanSnap Manager
However, please note that continued use of ScanSnap Manager is at your own responsibility, as it will no longer be supported or updated in the future.
For more details on the end of provision and support for ScanSnap Manager, please refer to this page.