I think he means that you should assign False to TruFal before each round of the loop. Before Element Exists, or right after the Sequence where you click the buttons (since here, TruFal is True).
But it does not really makes sense. I mean, if TruFal is True when you check if the “A delete” Element exists, and then there is no delete button, then TruFal would be False. So there is no need to “reset” the variable.
I solved a similar problem with the Get Attribute activity. The trick is to find the right names of the attributes:
If you open the current selector of the “Element Exists: delete button” in UiExplorer (you click the three lines and then Open in UiExplorer), you can have a look at the Property Explorer (in the bottom left corner). Maybe there is an attribute there which tells you which id the button is. Maybe the id itself, maybe the text which appears when you hover it, maybe something else.
You use Get Attribute to get the value here… That will probably be a string. And you can use this in your If statement, “If buttonID.Equals(“delete”) Then do …”