"Why am I having problems ordering with a credit card?
Please be aware that our online Webstore is based in Germany and requires an international payment. If there are problems with ordering, then we recommend to check with your card provider and make sure that they allow international payments. If that does not help, then we recommend to try a different card or payment method, like Paypal."
Ask Support is here. A user-created tutorial for that is here.
@Roy-Neese the current holiday season may have something to do with Customer Support replying. Please note also the Pre-sales (and registration) help at Online Live Chat, see section 6 here. (Unfortunately available on weekdays only.)
If the OP @Dana-Gooding still has the problem, please note the Live Chat option as well.
In the meantime download a trial of vp18. This way you will come to appreciate the changes and know that it will run on your hardware. The only restriction I know of is the 2min timeline limit. Once you succeed in paying and enter your serial no you are good to go.
The trial is not going to help me. I have been a Vegas Pro user since 1999, when the first version came out. I have supported this product since then, paying for every upgrade available, until Magix bought it. I have not been able to purchase any of the upgrades since then.
The support has been abysmal. I have never really needed any support, until now. Today is the last day of upgrade sell price. I have a project I have to get done and if I cannot resolve this today, then I have no choice but to switch to Adobe's product.
I have to wonder how much money Magix is throwing away every year due to people who want to but it but simply cannot get through the WEB site to get it.
I appreciate the attempts to help. I really do. I wish there was a way to get this resolved, but it does not look like it is going to happen.