You at least have the technical possibility to do so - not the case with closed-source or even cloud-based systems. It may be a breach of the license, and it wi

You at least have the technical possibility to do so - not the case with closed-source or even cloud-based systems. It may be a breach of the license, and it will be up to you to weigh the cost of potential litigation against the cost of stopping using the software immediately. Also note that fixing bugs/making adjustments doesn't mean releasing them - the latter may be a problem with some companies, but it's unlikely anyone would care (nor know about) if you do the former internally.