I'm a bit worried about installing a paid version of Lightroom over the trial version because I can't see the photos I previously loaded. Only some of them appear. I'm a novice. I was hoping to speak with someone at Adobe.
What do you see? In the library module you should be able to see the folders that you have imported images to. However, the last important that you did will be found under "Previous import". Anyway, what are you seeing?