If you going to provide a free version there is a better way of doing it. Downloaded and installed, at first it looked ok. Then after wasting time, I realised that certain elements can't be changed and the galleries don't look like the websites examples. It's been set up to push sales for the Pro version. Fair enough, but do the right thing and tell people. Very annoying as nothing is mentioned in all the reading provided! No thanks
This plugin was created with one simple task in mind. The name "Simple Image Gallery" is literal, obviously...
And by the way, we don't force anyone to purchase the Pro version as you mention, nor do we advertise features in the Free version that are simply not existent.