the crash report said ---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 12/7/15 3:46 PM
Description: Ticking screen

java.lang.ClassCastException: com.brandon3055.draconicevolution.client.gui.guicomponents.ComponentContributorsPage cannot be cast to com.brandon3055.draconicevolution.client.gui.guicomponents.ComponentManualPage
at com.brandon3055.draconicevolution.client.gui.componentguis.GUIManual.func_73876_c(GUIManual.java:196)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1661)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

This has been fixed already. Please update to the latest version. See #177.