Apoogies if this has been asked before, but the search doesn't handle numbers like 11.3 very well. And if you're just here for spam please just walk on by, nothing for you here!
I am running community edition 11.3, which is absolutely fine except for webmail, which won't run on recent browsers. I would like to upgrade to 12.x, but I've read here that I need to upgrade to 11.4 first. Please can somebody tell me where I can find the 11.3 to 11.4 installer?
Thanks in advance,