Puryloco

Hello, please help me with that question: I have mine-imator 1.0.0 (yeah, sorry thats the best my pc can support) checking the requeriments my pc enter in recommended. In other words, I have 8 GB of ram, a 1600x900 screen and Windows 10. However, when I use the program at first it runs smoothly but as I work the fps start to drop, remaining between 7 or 8. It should be noted that I don't have a card video so I suppose it is due to that but I would still like you to help me to make my mineimator go faster. Thank you