Importing slideshow from Photoshop to Premiere Elements 12

Since I have had the sound problem twice using Premiere Elements 12, I want to post the solution to the problem of sound suddenly not playing in a project in which it played earlier. I still have not discovered WHY the problem occurred, but at least with a great deal of patience and by the grace of God, I discovered what turns out to be a simple solution. But, of course, if one does not know what to do no matter how simple the final solution may turn out to be, it is very vexing.

So, in Premiere Elements 12, if a project you have been working on suddenly without warning stops playing sound tracks, try this:

1. in the menu line/bar at the very top of the screen click on Tools, then on Narration. The window shown below will open.

2. Then notice the small box that says "Mute audio while recording". If that box is checked, UNCHECK it. This fixed my problem. Once that was done, all my narration and music audio on my Premiere projects worked fine. Now, is the default setting a checked box? I don't know. I just know that my projects work fine while I am creating them, but when I come back and reopen them to do more work, the sound does not work. The first time this happened, I simply began all over again with a new creation of the project. The last time would have required too much work, so I simply began looking at everything---since there is no manual and NO help from Adobe, except this community forum, for which I am grateful. But no one here knew the solution either. So, that is why I feel compelled to post what I discovered today, August 8, 2019. Thanks to those who replied to my plea both times this happened. I hope this will help someone else.