If you are a Linux user like myself, and you use Wine to run the Watchtower Library, then you may get boxes instead of text.
This can be easily solved, and since I get this question a lot, I thought I would post my solution here.
Start the Watchtower Library, and look for an option to the top left that says "Library". Click Library, and then choose "Properties" as shown in the picture below:
(You can click on the picture to make it larger)
Once you choose Properties, you will get a box that looks like this:
(You can click on this picture as well to make it larger)
Change the text option under "Item" to another type of text. Then hit the OK button on the bottom of the properties box.
If the squares went away, you have successfully solved this problem.
If not, you will have to repeat these steps and make another text choice in the "Item" section.