Update.
Previously I didn't do any workaround for 'DE' keyboard layout as this problem appears in many code editors, even VisualStudio inserts Ü+ instead of []. But if this is necessary change I will try to fix that, at start there is now 'Add brackets' options in popup menu as you wanted with CtrlB shortcut, if any other keys need to be switched let me know (I'm using qwerty keyboard and it looks like that other chars like ;',. also should be switched).
EndFunction is highlighted, just style parser has some issues with parsing/coloring last chars in file, now should work better but some workaround is always to have one empty line after all of your code.
Create project works ok, tested on 2 pc's (win 8.1, win 7), maybe anti-virus software is blocking something, or try running it with admin rights (but this should be needed, editor save files only in temp directory), if you have VS 2013/2015 installed run source code and maybe this will give some hints what makes this problem.
After typing new/changing some variables press enter and they will be updated (rather current line would be parsed in search of keywords), also when switching to other source file current whole file will be parsed, so all variables should be visible in other sources.
Also can't reproduce that compiling error, it looks like file with definition of 'myglobal' variable wasn't compiled after typing it, I didn't encounter something like this even despite that I'm using this editor for normal projects and nothing like this happens. It looks really strange, send me sources for both files on pm or attach them here.