You should. Check that you don't have characters which aren't allowed in filenames and when you are exporting the bot, click the bot then click the export button and it may take sometimes ages to save the bot but it should always finally get over it and do it.And that's it your bot is now in Robot designs folder. Or at least it should go like that.
stuff
I don't mean it can't be exported.I mean,when i build the bot,then click on the back button at the lab,it goes back to the HQ page but without the new bot.