UPDATE

ISAPI update file
File type: Various data file
A .update file extension is related to the ISAPI (Internet Server Application Programming Interface). A update file stores update.
What is update file?
File type category:
Various data file
Date updated: April 19, 2018
The update file extension is used by ISAPI /Internet Server Application Programming Interface/ Loader which is a program that allows DLLs to be "hot-swapped" on a Microsoft IIS web server during execution.
It contains updated DLL file contents for the Web server. It is automatically recognized and updated by ISAPI Loader.
How to open update file?
Probably not meant to be accessed by the user.
How to convert update file?
Probably cannot be converted to anything else.
Suggested software to open update file:
Associated software actions with the update file
Software applications that handle other tasks involving update files:
ISAPI Loader (Microsoft Windows)