Create an account online to access the library on your Mendeley Reference Manager desktop application and via your online account, following the steps below:
Visit www.mendeley.com and click on Create account in the top-right corner or Create a free account in the middle left.
Type in your email and click Continue.
Fill in your account information and click Register. You will be prompted to fill-in your public profile information.
Once your registration is complete, you can download Mendeley and start the installation.
Download & Install Mendeley Reference Manager
After you create your online account, click on Download to download and install Mendeley Reference Manager Application, and follow the installation wizard instructions. You may also download it from here.