Updating to Pro Office 1.5.1 failed

Funny stuff here. Tried automatic update twice. Both times with DTPO running. Over the weekend, it looked like it was downloading the file. Reported it was reinstalling and then came back with the same version, 1.5. When I logged on this a.m., automatic update feature asked if I wanted new version. Downloaded 81 mB or so, asked if I wanted to reinstall. I said yes but the program never reappeared. I could not boot from the icon in the applications folder, which had now changed to a series of graphic tools, a t-square, ruler and something else. I rebooted. Still couldn’t invoke the program. Finally downloaded DTPO from the website and reinstalled manually. Things seem fine now.