Construct 2's backwards compatibility is excellent and thousands of users regularly upgrade without issues. Conversely, staying on old versions means you run in to issues we've already fixed, like you have in this thread. So actually I think it is more risky to not upgrade. Which version are you using? You can always back up your project and test the latest version without risking your project.
I'm unsure about the version I am using, but I assume that what you are saying is the issue. I'm not far from the most recent version and when I get on my PC, I will backup my project and attempt this Thank you very much!
The only possible point I could make about it NOT being it, is that it was working originally, I could upload to my host, reupload the same project to update it over and over and it wouldn't stop working, it only seemed to happen after developing a local storage high score system and other games such as my Super Mario Bros. remake still works on the host, which was developed on the very same version. This is only a small point though and I assume that what you are saying is correct, if this issue is not fixed by the time I update and everything, I will come back to this thread and post my .capx etc.
Thank you very much both of you guys for all the help!