V4.1, you're many years out of date. As long as your subscription is current, it's a free upgrade. The latest version should always be used.....currently v.13
If you need to renew your license..... https://www.machform.com/pricing/
It's a seamless upgrade process... .https://www.machform.com/upgrading-machform/ (retains existing forms and data)
Download it from your Membership downloads area. You would have access to this if your subscription was current. https://www.machform.com/account/
Anything further, you will need to submit an official support ticket to Appnitro from your members area as the forum is for community discussion more so than official support.