Vuforia Model Target Generator not saving model targets

I am facing issues with the Model Target Generator application? Out of the few model targets I have made, only one has survived so far (see the image attached). I followed the app’s instructions in setting up the other tagets and even generated guide views, which went well, but once I closed the app, the models would disappear, but my model counter was still decreasing. The model target folders on my machine were also empty after generating the other models.

How could I either recover the other models generated, or reset the counter back to 19 remaining model targets?

I tried contacting PTC, but they mentioned they only deal with licensing.