When adding a drive to a pool, Drive Bender can optional remove the drive letter for this drive. To view the contents of these drive, you need to re-add the drive letter. You can do this via Windows Disk Manager.
Open Windows Disk Manager (right-click Computer, select Manage, from here select Disk Management. Alternatively you can type "compmgmt.msc" and select enter), find the drive in the list of drives available on the system. Right-click the drive and select "Change Drive Letter and Paths", and add a drive letter to the drive. Now the drive can be viewed via Windows Explorer.
You can remove the drive letters with the same method.