To reactivate, launch the ChemDraw application and click 'Activate' on the 'Help' menu then put in your serial number (it shows up automatically if you originally activated on the same machine).

Reactivating will extend your current software's license until. You may either upgrade to version 12, or may keep version 10 or 11 by reactivating with your existing serial number. If you are using ChemBioDraw Ultra 12.0 version 10 or version 11 on a PC: If you experience any trouble, contact Chemistry Librarian. MIT Libraries has renewed ChemDraw annual site license, and in order to maintain your working copy of ChemDraw Ultra 12.0, please follow the steps below.

Complete the installation using the serial number (and registration code).

You will be able to see the details and the serial number. In case you do not receive an email with your codes, please check your spam filters or visit log in with your email ID & Password, click on 'My Downloads'.Look for an email from You will need this to complete the installation. The Serial Number and Registration Code (MACs only) will be emailed to you immediately.Choose the appropriate download link (PC or MAC version) and go ahead with the download.Scroll down to ChemBioDraw Ultra 12.0 Download edition.This will take you to a page of links to download the software.

See Accessing Your Software in the middle of the screen and click ' Download Site License Software'.Go to My Site Subscription (right hand side under Services).

Chemdraw ultra 12.0 crack