I looked in the settings screen area (bottom) in Trapster and found only "copyright and patent pending information about the Trapster app installed on my iPhone 4S. However, no indication of the version information of the Trapster app installed on my device. Unfortunately, the AppStore provides version information of the Trapster app that they are offering for download and a screen shot of what the home screen of the Trapster app looks like. But, no indication of the version number in the Trapster app itself (Settings area). The Trapster app that I have installed on my device looks like the 4.5.1 version, but I don't remember if the previous version resembles the 4.5.1 version or totally different..
Thank you for the clarification and sorting things out for me. However, in my humble opinion, I don't think that I could interpret the omission as a bug (as I would think of a bug), since it doesn't interfere with the functionality of this wonderful program. In all probabiltiy, more or less, nothing more than an incidental oversight that once provided will offer a convenient point of reference for the users. Especially, now that you are aware of it. Again, thank you for your attention to this matter.