Q: Final Cut Pro X 10.0.8 not working under Yosemite

YYou need to update to the current version of the application 10.1.4, which is significantly different from the version you're using.

got to App Store, purchased, updates.

Where is this update in the App store?

It's not listed in my "automatic updates list" -- although iMovie is ---  and the only other place I see it is for sale ...  at $299. Thanks....

Is it on your Purchases page? are you signed in with the Apple ID used to purchase it?

Ah, I will have to look for that ...

I'm not seeing Final Cut in my purchases on this device ...

However ...

I did change my Apple ID a few times since 2012 (I kept forgetting it and also wanted to consolidate with my other Apple devices ... )

I actually have Final Cut 10.0.8 installed on two computers. I updated Final Cut on the laptop last year to 10.1 .... but KEPT the old FCP version on the desktop because I liked it.

However, since I updated to Yosemite on the desktop last week, Final Cut 10.8 will not open --- and I don't have an "update option" in the App store.

Will this happen on my laptop if I update to Yosemite? That device is running Mountain Lion, I think.  But I would hate to also lose Final Cut 10.1 ... it's all I seem to have left.

Do I have to purchase Final Cut again for both computers? Thanks very much for your help, it is very appreciated!

YYou shouldn't have to buy it again. You only need to buy it once. It's tricky if you changed you're Apple ID. Nit sure what you do. YYou might ask the question on the App Store forum.

It's also not in my purchases list.

Now I can't use Final Cut. I was able to use it when I hadn't yet upgraded to Yosemite.

IF it's not there on with your hidden purchases then you're not signed in with the Apple ID used to purchase it.