Thought I'd retired but a friend wants a site building/modernising etc

Immediately, well the day after, I came & bought the X5 Pro because I used to use you a couple of years ago.

I spent a lot of money on objects & bought a handful of templates, which show up still in my reinstalled freshly bought X5 software.

One of which I thought would be ideal to adapt for my friend.

Alas all I get is

3Sounds

An error occurred while loading the project

[Object reference not set to an instance of an object.]

Tried with some of my other templates and get the same overall error. I'm guessing that an object used in them is no longer supported/has been updated/replaced.

Fair enough time has moved on I guess but should that really render templates fully unusable?

Any fixes/suggestions?

I really like my purchased templates lol

In advance cheers!