Installing vTAS through the Java Web Start mechanism
This will give you the opportunity to install a standalone version of the application on your hard drive.
If you used a version of vTAS older than v4, prior installing a new version it is recommended to delete the old preference files.
E.g. for macOS users, delete folder ~/Library/Preferences/ILL/vTAS.
Windows and Linux
Go to the "Download" menu of your browser click the vTAS.jnlp file