Export the data from your ADM by using the "create transfer files" feature. This is found in tools>power tools>create ADM transfer data. We will run through that utility, and be sure to save that somewhere that we can easily find it, such as your desktop.
Once you have created the transfer files and saved them on your desktop, we will do an uninstall of the program. Once uninstalled, please go to the C:\ drive and DELETE the ADM folder.
Once deleted, we will want to reinstall the software. Once reinstalled, you can open the program and choose tools>ADM data transfer>import transfer data.
This will bring all of your data back into the fresh installed program, and you should not see this error again.