The problem occurs also with plain keepaas for example with the "target window" input field. With my computer at home keepass runs well without problems. In the company on a second computer with freshly installed keepass the problem arises eaqually to that stated above. The property in common of the two computers is the used Kaspersky AV-software - without this AV-software keepass runs well on a similar computer. Kaspersky doesn't show a hint that someting is blocked. So I think we can close this...
Editing input field by mouse failed