The case explained is that the PS main booting screen appears, but the application window does not right?
One thing to try: In your "C:\Users\YourUserName\AppData\Local" there's a Tecnomatix folder which contains some user xml config. This folder is automatically created when starting TX and keeps being updated as you change software config.
Try to rename/delete this folder and start the software again. I experienced in the past some issues related with this folder.