Save as .tun and not .ctz?

Is there a way to change a .ctz to a .tun or do i just need to use version 7.2 for everything?
Only ever used as a scantool,now trying to tune something with it and just not very familiar with it.

I updated my efi live stuff right before the beginning of new year I was able to open an ctd file and click on file save as then hit drop box to save as a tune file ill pm my email if you don't want tp update your stuff and see if I can save it as a .tun

Not sure how,but I have like 3/4 versions of efi on laptop.
one is 7.2-saves as .tun but won't open a .ctz
7.5 won't save as .tun and then there is v8 and another one floating somewhere.
v7.5 is what I read with and use.
Really should have familiarized myself with it first,bought a truck specifically to figure it out but trying to get a driveable tune on this huge cammed truck today/tomorrow.

Try "save as" with .tun on the end.
so far seems to be a winner in V7.5

ps,your inbox is full

yeah I just noticed that and cleaned it out thanks