Error compiling while trying to upgrade firmware

I'm receiving the following errors in the Arduino software after clicking the verification button:

Marlin_3_14_14.ino:33:27: error: Configuration.h: No such file or directory
Marlin_3_14_14.ino:34:18: error: pins.h: No such file or directory

But I can guarantee you that both the .h files are there!

Firstly, I modified the configuration.h file to allow max temp of 295 for my E3Dv6 hot end and TEMP_SENSOR_0 5. Arduino software asks me for permission to put Marlin_3_14_14.ino into "sketch folder" - I click ok. Once open, I click the verify button and get the above error messages.

I mistakenly uploaded the auto bed levelling version of the firmware previously (oops - auto levelling just a pipe dream at this point) and so am trying to replace it with the above.

Any ideas on what's causing the errors?

 

You know - its amazing how posting a question on the forums can make your head clear! I've figured out the problem all by myself!!
As it turned out, I had previously downloaded the software and forgotten it was still in my downloads folder. So when I redownloaded, my mac automatically added -2 to the folder name. So it seems that was why the Arduino software couldn't find what it was looking for.