I think there is a misunderstandement, Telles0808 asked you to upload a capx file, which will show the project in its integrity for the bug report, in this case though, it is not very useful since it is the project folder save that has the issue (even though I think the capx would have the same information too), I think he meant that the state of the project folders bar should not be saved in the main project file (the caproj one), but inside the one that is said to retain the state of the editor (the uistate one), since the change of state of the editor should not be a data to be uploaded, as it is now, the main file will be changed and upload even if it has no fundamental changes, which can be a problem when working with some source control program in a team.
My misunderstanding, apologies to Telles0808.
The .capx file is just a zip file, containing the .caproj file, which contains the said setting. But there's no point. It's not project specific, it's the way Construct 2 saves this setting in the wrong file, in any project you create, even an empty one, as I explain in my original post.