WIP6 expires?

I am a Rhino5 user but the last year I used very frequently WIP6.
Files saved in 6 can not be opened in 5.
Does WIP6 “expire”? so I have to check all my saved files and save them as V5 again?

Update:
I am not a professional user

Rhino file versions are not forwards compatible, so if you plan on no longer using Rhino6 (i.e. you’re not buying the program) then you will have to save all your files as Rhino5 flavours before your beta expires.

And yes, Rhino6 beta will expire relatively soon, and you will have to purchase a license/upgrade for Rhino6 in order to use it, and of course you get access to Rhino7 WIP at the same time.

How much time do i have?

Should be around 45 days from the date of the last released Beta.

It should also be pointed out that you can use the V6 demo for 90 days, after you install it.

HTH,
Don

tnx!