You can manage and remove the password with the help of the application called Password Protecting Manager. The first thing to do is to download the application from the official website. Access the page and scroll down, then download and install the application. Follow the guide as shown in the image below, then open the PasswordProtectionManagerEng.chm file. Browse to Unlock and follow the procedure to unlock the drive.
I don't have a compatible drive so I can't provide step by step instructions, but the help file should be informative enough to resolve the issue. It also has pictures to easily understand what's happening.