We bought Solidworks in 2017, Got a DVD and signed up for a subscription, which we used to upgrade to 2018. After which we had to cancel the subscription.

So we used 2018 up until recently, where our machine seems to be packing up, and we would like to install 2018 on another machine, though trying to do so using the 17 DVD won't allow the install, there is no point in installing 2017 as all our drawings for the last 3 years have been in 2018.

What can I do to carry on as usual? It's seemingly impossible to download a legal iso of either SW 17 or 18 or has Solidworks boxed me in and forced me to abandon all the work done the past 3 years?