This is the most critical factor. Octoplus Box is a dongle-protected product.
Run old versions inside a Windows 7 virtual machine (VirtualBox or VMware) with no network access except USB passthrough for your dongle and phone. This prevents the old tool from phoning home and also contains any malware. octoplus samsung tool old version
Using an Octoplus Samsung Tool old version is legal in most countries for repairing phones you own or have permission to repair. However: This is the most critical factor