ChartViewer

I use many charts in form of .png or .jpg etc. by clicking on the files to view them during work. with this project i would like a program, that is functioning on all common computers and able to help me view dozens of charts in a simpler and more structured way with very few clicks or by using hotkeys(eventually also by using voice activation). important features: having a small changable layout where i can click labeled buttons that open charts in a seperate window that i associated the button with. the buttons in the layout can be structered in several groups, rows and lines beeing able to combine X amount of charts as a group that will open simultaneously the size of the chart adjusts to the size of the window zooming in and out of charts is possible window positioning can be saved hotkeys can be associated with opening certain charts program can only be used with a licence key that only works on one computer total, but the computer can be changed and licenses have expire dates i can set additions: program can only work while connected to "my" server i can add advertising i can add premium features for premium users (e.g.: in the free version only X amount of buttons can be labeled and opened and only in premium version its possible to combine windows and opened by clicking one button) (thinking about 2 different versions: a) one free and one premium version b) just one version that is able to adjust depending if user is a free user or premium user