Scripts execute from top to bottom. MATLAB does not have a GOTO command. However, you can accomplish this by reorganzing your code. For example, consider putting all the code you want to rerun inside a while loop, and repeat that loop as long indx==3.
indx == 3
while indx == 3
% After the code has done some stuff the user is left with three options:
list = {'text1','text2','RERUN_SCRIPT'};
[indx] = listdlg('SelectionMode','single','ListString',list);
% Use a switch statement. The loop will continue execution as long as the user selects 'rerun'
switch indx
case 1
% code for importing works
case 2
% code for deleting unwanted external files work
end
end
