You may need to uninstall an old version of the library before installing the newest version. This information will be stated on the page where you download the library.
To uninstall the library, it is as simple as deleting folders containing the files on your computer.
1.Locate the files on your computer. The file path will be similar to this example.
2. Select the OI files under \implant and delete them. Do the same for \modelcreator\implants.
To install the the latest version go to openimplants.com/downloads and get the new library.
For help installing watch the 2 minute video below.