System bug for Art Text 3

Hello, after the update to "Beta 10.13.5", the program Art Text 3 doesn't work well. Specifically, it is no longer possible to drag layers to move them.The program developer say that it is a bug of the system update and that it happen only on beta. I would like to know if this is true and if the next update will fix it, or if I can make something to solve the problem. Thanks