Is there a reset button for a project

[jzfusion]

I'm finding that when I have spent countless hours on a project sometimes adding a block can completely make the whole project stop working. The only problem is after detecting the issue and removing that block, it seems to be persistence so that the one block completely ruins the whole project.
This has been particularly true for when you try and customise stops for buy/sell blocks. I have worked on a EA over the weekend and suddenly it seems to be totally useless. How far can I retrace my steps?
So my question is, is there a way for me to UNDO apart from simply having to back up the mql code?

[ambrogio]

@jzfusion Like a "undo" button

[jzfusion]

@ambrogio
That's very helpful