Two questions: Is it a custom font? Were you using text styles for the text in the buttons? It’s possible that the new installation of Lectora reverted to an “original” text style. An example of this is the installation on my laptop versus my desktop. I have a “drop down text” custom text style on my desktop, but not on my laptop. I didn’t see the behavior before I created the text style on my laptop on the same course, but it may be something to check.