Migration of TC 7.52 proj. to TC 8.6

Hi,



When I open a TC 7.52 project in TC 8.6, it pops up a message to confirm if I want to upgrade to the settings of 8.6.

Once I click Yes, the project opens.



Since, the proj. settings got changed, I'm now unable to open this proj. with TC 7.52.



Is there any way by which I can keep 7.52 settings and still open in 8.6? Or, convert the settings and still be able to open the proj. in TC 7.52? I don't want to maintain multiple copies of the project.



Regards,

Ashish