On the database it is not, which works perfectly. The phone book is saved correctly and the messages associated with the callers correctly. Each call is displayed with little pictures and names on the screen as it should be, only the log will be empty. Several phone calls and a TeamViewer session with the technicians of the problem KlickTel have been unable to solve. One can there allegedly not reproduce and the software would have been tested under Windows 8 (64-bit).
I am currently unfortunately at my wit to end. A deletion of registry entries and several new installations bring nothing. There is also no "exotic" computer because it was a new installation. I very much regret that and if anyone can confirm the problem, or even a solution for it has, I would be glad about a comment very much.