Trying to update getting error, crash

I'm trying to update from version 3.2.43 on an Asus tablet. The update from the Google Play Store seems to download completely, and then starts to download again. After a couple of rounds of this I get an error message: "Can't update app" with an error code 963. Then, when I switch to any other app, the tablet shuts down and restarts. Any suggestions?

Although it looked like I had plenty of storage space, I did a cleanup and moved Pleco to my SD card, and then successfully updated the app. It's telling me that I now have v.3.2.57 - is that the current one?