If for any reason the PaperOffice installer crashes during the installation process you can always install PaperOffice manually as described below.
Download the latest PaperOffice setup packet from this link: PaperOffice latest release
Create a folder named "PaperOffice" in the desired location, usually
Extract the content from the downloaded PaperOffice setup file to the "PaperOffice" folder.
Once extracted the folder structure should look like this:
To finish right click on the "com.paperoffice.launcher.exe" -> Send to -> Desktop (create shortcut)
Now you can launch PaperOffice as usual from the Desktop icon.