Publishing using Catalina OS

I recently had to replace my harddrive, during which the service person upgraded my operating system to Catalina. When I opened my website file in Rapidweaver 8.7, most of the IMAGES would not display (the info about the images, links, etc., remained, but the images themselves cannot be seen. I honestly do NOT want to go back over several years’ worth of work to deal with this. I’ve downloaded the .zip website backup file, ,and am wondering if I can somehow reload that, and resave, and have the site graphics be visible in the app - or is there another workaround??? ALSO: When I hit the “preview page” button, it tells me it cannot load the file to (blank path given)… Is there a fix to this? Again, I don’t want to have rebuild the entire site by virtue of this problem. Thanks.