Congratulations. No issues here after a quick try different test files. At least not so far for:

1. Edition > Paste style.
2. Group item edit.
3. Add/delete room points.
4. Text tool, formatting and 3D view.
5. Background/texture import size warning: Background image proposed reduced from 7064x4960 to 3375x2370, but maybe most important is the warning message).
6. Pitch rotation of the virtual visitor.
   [/list=1]
   Great features, nicely implemented. Especially 1 to 4 are very welcome. Will try more later.
   ok
   PS (The Java Web Start link prompted a Java update and the installer defaults to installing a toolbar / changing home page. Just read carefully if Java wants an update.)