amator purpura

I searched this forum for a while and could not find anything on the subject, wherefore I have started this. Sorry if the subject already exists. I do have two parts to the issue which may or may not be related. I played Naval Action a while ago, and it ran fairly well. My computer is not very good at running games, but it is capable, and it ran Naval Action well enough. However, recently, I have not been able to get in to the game, nor have I been able to update it in order to play in the open world. I cannot find anything in Steam to update the game manually, and it obviously has not updated automatically. Nor have I seen any options elsewhere to download the update. The other puzzling part to this issue is that I could not play Naval Action sea trials within the last couple months. Whenever I get into the client, it declares that Shader Model 5 is required and that I have Shader Model 3. However, I have DirectX 11, and since I have played Naval Action (which requires Shader Model 5) on this machine before, my graphics card must therefore be comparable with Shader Model 5, as far as I can reason. (I have a GeForce GT 630M, which has worked well enough for me for a long time.) Wherefore I assume that something else is wrong, but I cannot diagnose it beyond this; I am not computer savvy. Please let me know if there is anything else I can do to get my client working.