Time Capsule not working
I have problems with wireless backups with t Time capsule and a new updated MacBook pro. My computer cannot find Time Capsule any longer. Airport Extreme seems to be working and I feared that I perhaps have been hit by "heartbleed" and tried to update my Airport Utility (my version is 6.3.2) and I understand that the recommended version is 7.7.3. However, I am not able to find a place where I can download this version. When I search under downloads I only find information about this version, no download option.
What to do?
Airport Time Capsule 802.11ac, OS X Mavericks (10.9.3)