Hi,
If I read you correctly, then you should only be using one .psyexp file, with four conditions files. The trick is not to write in explicitly the name of the conditions file in the loop of your file, but instead to use a variable that controls which conditions file is used on a given run of the experiment.
e.g. when running locally, you would add an extra field to the information dialog box that opens at the start of the experiment, labelled, say, condition_file, where you would type values like A, B, C, or D. Then in the conditions file field of your loop dislodge box, you would enter something like expInfo['condition_file'] + '.xlsx'
If run online, I think you can pass parameters like that in the URL to the experiment, and access them the same way, which I think is explained here: