Hi helix, thanks for your response, and sorry for not answering sooner but I've been on holidays and came back today.
I supposed there must be something weird about it as I couldn't find any official source for this. I've finally been able to deploy that version but it doesn't work as expected as when uploading a file (the same file all the time), it sometimes crashes and sometimes it doesn't. There seems to be some problem with the code, so we're discarding this idea.
At our work we're trying to deploy a little footbridge between Alfresco to DSpace. Basically, we've been working long years with Alfresco and now we want to migrate all our data to our DSpace 3.1 installation - So basically what we need is a console application or tool that would take a zip with the file and its metadata and index it in our DSpace database, as these are long GBs of data, so we need something that would automatize the whole process. The guys from one of our departments are able to extract the files and their metadata from the Alfresco DB, so now there's just this left. We've been trying to find something like this but that's the most solution we've found up until now, so if you could give me some advice on how to do that, I'd really appreciate this.