[BUG] filter that completely kills FF

Hello Everyone!
My today's experiments ended up with a disaster.
I tested one script, for the test I put it in a group and copied it several times, then I connected group input and output to each other. In some moment FF crashed. I have not cought wich action i made last but I can't even open filter forge now
With this 'destructive' filter in a library filter forge crashes a lot just by clicking on any filter that has map script component (or may be not, I didn't fully recognize pattern of crashes), its hard to work now.

I don't even know how to remove or restore this filter if a single click kills app.
Here is the file with filter, be carefull with this.
I couldn't send bug report because chrome says that "No bug report info found" after I tried to submit it. Anyway I think its easy to reproduce this bug just by loading filter.

[FFXLib::RenderingContext] Failed to load filter My Filters_offset calculator.
[FFXLib::RenderingContext] Failed filter dump:

.... my filter xml here

[Controls::Control] Exception occured while processing window message 0x00000201(WM_LBUTTONDOWN) (0x00000001 0x015200B6) for window 002C0F5C/002C0F5C, control: <class Controls::ListBox>@03B64D18.
Exception caught at thread 000029CC 'Application':
<class XFW::StateError> Unable to create a second instance for single instance class ScriptMap01.

<unknown file>(0) : <unknown function>()+0 at 006B61CA in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 006B1E27 in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 00409E7B in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 006B985F in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 006B4820 in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 006B484E in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 00412DFC in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 0076F9FC in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 00409E7B in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 0076134E in Filter Forge x86.exe
<unknown file>(0) : <unknown function>()+0 at 006BBEC7 in Filter Forge x86.exe
CONTEXT_CONTROL: CS:EIP 0023:75A6B9BC, SS:ESP 002B:0018C568, EBP 0018C5B8, FLAGS 00200212
CONTEXT_INTEGER: EAX 0018C568, EBX 0435FB80, ECX 00000003, EDX 00000000, ESI 00B221A4, EDI 0018C5F8
CONTEXT_SEGMENTS: DS 002B, ES 002B, FS 0053, GS 002B

offset calculator.ffxml