Hey there ;)
First I want to say it is an great Mod you made.
But now i got to the Problem.
I am working on my Owen Mod Pack atm.
I made 1 to see wich Mods i want to add to it and what i need to change to get that Mods
work together. Also i tryed there the First time BQM to make some Quests.
The 2nd One is my Final decision on what Mods i want to use.
In Order to not redoing every Singel Quest i made in the First time i Imported the Quest I already made.
I was deleting the Quest for Mods that i dont use now and ended in a crash.
Cöuld it be that the crash happend because of the missing Mods
or did i just broke the Quest Database ?

Thats is what the Log shows me :

java.lang.NullPointerException: Rendering screen
at betterquesting.api.client.gui.lists.GuiScrollingBase.drawBackground(GuiScrollingBase.java:81)
at betterquesting.api.client.gui.GuiScreenThemed.drawBackPanel(GuiScreenThemed.java:96)
at betterquesting.api.client.gui.GuiScreenThemed.func_73863_a(GuiScreenThemed.java:108)
at betterquesting.client.gui.editors.GuiQuestLineEditorB.func_73863_a(GuiQuestLineEditorB.java:97)
at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382)
at sun.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at Reflector.callVoid(Reflector.java:529)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1417)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1076)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:236)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:297)
at org.multimc.EntryPoint.listen(EntryPoint.java:162)
at org.multimc.EntryPoint.main(EntryPoint.java:53)