Delete series of Flash Player updates installed in Download Folder?

For some reason, I couldn't quickly find the answer to this question via search engine,
...nor did I find the answer via the express-search on TSG.

Every few months, Adobe nags me to update to the newest version of Flash Player.
So I've been complying.

I now have quite a number of their Red Icons (ranging from 1,000 to many-thousand KB) lined up in my Download Folder.

So is it OK to delete older ones, and just keep, say, the 2 newest ones in Download folder?

Thanks.