SimpleIDE not finding simpletext.h

I am on Linux Mint i686. I just installed SimpleIDE and I am trying to build the sample Hello World program and it is failing. Here is the error I am getting:

Project Directory: /home/user/Desktop/SimpleIDE/SimpleIDE/My Projects/

SimpleIDE Version 1.0.1
/home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/
/home/user/Desktop/SimpleIDE/SimpleIDE/ Updated on: 2016-05-02

propeller-elf-gcc -v GCC 4.6.1 (propellergcc_v1_0_0_2408)
propeller-elf-gcc -I . -L . -I /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Utility/libsimpletools -L /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Utility/libsimpletools/cmm/ -I /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Text Devices/libsimpletext -L /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Text Devices/libsimpletext/cmm/ -I /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Protocol/libsimplei2c -L /home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Protocol/libsimplei2c/cmm/ -o cmm/Welcome.elf -Os -mcmm -m32bit-doubles -fno-exceptions -std=c99 Welcome.c -lm -lsimpletools -lsimpletext -lsimplei2c -lm -lsimpletools -lsimpletext -lm -lsimpletools -lm
In file included from Welcome.c:26:0:
/home/user/Desktop/SimpleIDE/SimpleIDE/Learn/Simple Libraries/Utility/libsimpletools/simpletools.h:111:24: fatal error: simpletext.h: No such file or directory
compilation terminated.
Done. Build Failed!

Click error or warning messages above to debug.

I have tried installing it to a different version of Mint that I booted from a LiveCD, and got the same problem. The header file "simpletext.h" exists, its just not being found for some reason (It is in "Simple Libraries/TextDevices/libsimpletext/simpletext.h").