RapidCart Pro 4 is actively supported and updated.
Latest RapidCart Pro version available is 4.10.1 released on April 16th, 2018.
https://rapidweavercommunity.com/addons/plugins/rapidcart-pro-4
We have recently changed our support system due to handled problems and now all support is managed thru email.
Our support website is available at https://help.4gnd.com while you can send an email to help@4gnd.com to get support.
In addition we are currently working on RW8 support and a compatible version will be available when RW8 will be released.