KI 2852 Mac Managed Software Center
(updated )
The program can be opened by searching for it in Launchpad (or cmd + space)
Here you can browse for available software and install programs
Corrupt Managed Software Center
If for some reason MSC becomes corrupted you can try to to reinstall it manuallyYou can download Munki (Managed Software Center) manually and re-install it from the project's GitHub-page.
https://github.com/munki/munki
Since the programs hasn't been "notarized" you must jump through some hoops to open the software installer like described in the link below:
https://support.apple.com/en-us/102445
(https://developer.apple.com/forums/thread/103956)