The last version of the program was tested and there was no such behavior detected as you describe. However, this problem may be caused by the outdated Internet Explorer or Java application that are needed. I advice you to update the Web Creator Pro software and also Java because this may fix some errors. Also, try testing your project in another browser like Google Chrome of Mozilla Firefox.
I strongly recommend you to save your project and 'close and open again' the program (to be sure that you don't lose your data) before any testing on web browsers.