@RK-THC – The latest patch for InDesign CS5.5 is version 7.5.3.
But I suspect something else here:
You want to open an InDesign file getting an error message to update your modules.
This InDesign file might be saved in a version above, in CS6 or CC, and cannot be opened in the lower version.
You have to use the exchange format IDML to bridge this gap between the versions.
Here a script by Jongware to find out what version a .indd file is:
[Ann] Identify Your InDesign File
Message was edited by: Laubender