I agree with Mike Darwood

I agree with Mike Darwood (above.) Although I haven't used Casablanca in many years I always found it to be an excellent family of devices for basic editing and, from what I understand, it has kept up with changes in the editing world and is a sophisticated modern device, running under Windows 10. Chet Davis is extremely knowledgeable and helpful.

An alternative would be Corel VideoStudio Ultimate X10.5, a complete editing suite aimed at the consumer market. You might also take a look at Magix  consumer products although I can't vouch for these.

As for customer support, don't expect much. Software products are sold "as is" and the expectation is that you will figure out how to use them on your own. YouTube is a very useful source of information about many products, with extensive on-line tutorials by users, and quite a few software programs have thriving forum support groups like the one you're on now. If you can't find a forum check the Creative Cow web site.