Hi speleo,
Welcome to the Sony Community!
We recommend running the Initialization tool for PlayMemories Home to help resolve the issue. This will reset the program back to its default settings. Also make sure to install the PMH add on to create discs. If the issue persists, uninstall the program and reinstall the latest version of Playmemories Home.
To learn more about PlayMemories Home, please click here.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
If my post answers your question, please mark it as "Accept as Solution". Thanks_Mitch