Variation Image is not shown in swatches

Hello Support Team,
two months ago you have solved some of the problems and everything worked fine. I have spent the last weeks working on other projects and now that I turn back to the former project I have noticed that your swatches plugin doesn’t work anymore. There is no output of the variation image in any constellation. What has happened? What I had changed in the meantime: I have installed the newest version and had bought the Pro Version of your other plugin VARGAL. There is no way to set it like it was before. Please check and help. Sincerely, Clemens