This is a patch release for Data Crow 4.0. It fixes the reported upgrade errors, contains a performance fix for the server and many other issues.
About Data Crow: Data Crow is the ultimate cataloguer. Out of the box it catalogues movies, books, software, music and pictures. The modular approach of Data Crow means that you can extend Data Crow with new collection management modules. Main features: online services (get information from the internet), file parsing, loan administration, customizable interface, module wizards. It's feature rich and can be changed as to meet your specific needs. However, if you want a simple product you can just use the out of the box configuration.