It seems that this tool was bought by Nero. It's advised to upgrade to the new program, because it has the possibility to add more data to a disc that is already burned. However, you will not be able to do this, if the disc was created in a session that was finalized by the user. If this isn't your case, when you insert the disc into CD \ DVD drive, the auto-play window will let you choose the Continue multi-session option. This option is available only after you install the latest version of the burning tool. If the auto-play window doesn't appear, after the disc is inserted, right click on CD \ DVD drive and choose Autoplay.