Launch problems after reinstall

Hi
So I tried to install Platinum Plus on a new PC using the latest full download and upgrades. It's been a while since I last did a full install.
The program launches but then closes straight away before I can do anything. I didn't seem to be able to enter our serial number at the install as it was rejected, not sure if that has anything to do with it?
Win 10
Thanks
Terry
So I tried to install Platinum Plus on a new PC using the latest full download and upgrades. It's been a while since I last did a full install.
The program launches but then closes straight away before I can do anything. I didn't seem to be able to enter our serial number at the install as it was rejected, not sure if that has anything to do with it?
Win 10
Thanks
Terry