LPC1788 external interrupt with CMSIS
There are no newer versions of these functions, because neither older ones ever existed!

To clarify myself these are not CMSIS functions. Downloading the official package from NXP, in either version will not include them.

These are functions from a different peripheral library, that you downloaded along the CMSIS (either explicitly without remembering it, or implicitly by your IDE itself). CMSIS has nothing to do with what you try to accomplish.

You need a peripheral library to get such functions.You may:


Identify which library you were using before and download it again
combining it with the newest CMSIS version.
Download another peripheral library, like for example LPCOpen by NXP
Write these functions your own.