There are two ways to un-install DIR3D:

1) Select the unInstallShield icon in either the Windows 95
Start Menu or Windows NT Program Manager group.

OR

2) Start UNINST.EXE running with a command line like:

C:\WINNT35\UNINST.EXE -fC:\Programs\DIR3D\DeIsL1.isu

The Windows95  Add/Remove programs option will not reliably
remove DIR3D, so use the un-install utility.