What about if I used a second "tool upload" tool? I took the python script from an earlier version and named it upload_old.py and did the same for the xml file (upload.xml -> upload_old.xml) while changing the latter to call the new python script. Nevertheless when I did that and tried to run it I got a popup window with the following error:
From: jen@galaxyproject.org
Date: Fri, 26 Feb 2016 10:22:44 -0800
Subject: Re: [galaxy-dev] Downgrade tool upload tool
To: makis4ever@hotmail.com
CC: galaxy-dev@lists.bx.psu.edu; galaxy-dev@lists.galaxyproject.org
Hello,
The Upload tool is a direct component of Galaxy. To use an earlier version of the tool, I believe that you would have to run an earlier version of Galaxy.
Others here can amend this, if they know of an alternative.
Thanks,