mov  [ofn.lpstrTitle],NULL    

For example you can't convert a hex value that starts with a letter like F or what's the point of

it should be coded neatly or removed from the program because what's the point of a buggy converter if you have a perfectly working one already(calc.exe)?

Most of the bugs you discovered are cosmetic ones and not very likely to cause any serious damage to an end user.

You are right on point that any feature that is there must prove to be useful.

The point of the IDE calculator is not to replace calc.exe, but to provide you the tool that behaves *exactly* like FASM, including the 0x, $ prefixes and h suffix.
It is not a HEX2DEC converter, but an evaluator. Try this for example: ((1234567890*234567890) SHL 2) * 7

I accept your view but the fact that writing D6fCh in the field does nothing even though i put an h sign at the end defeats the purpose of prefix and suffix. Fasm is famous because you can freely use most of the conventional pre/suffixes. But the calculator has this small but odd behaviour.

And I didn't even search for bugs, I was just using the program normally!

if people don't need a reliable user interface why do they need UI at all? Command line all the way!

Did you close this case as not a bug? What about my first post?

    mov eax, ($8000+99+(beef-aaac)*3+$ff) ; Constant (< 64 KiB)
    ...
    ...
aaac: db "AAC", 0  ; Advanced Audio Cooling
beef: db "BEEF", 0 ; From cows ...
    

    mov eax, (8000+99+(beef-aaac)*3+ff) ; Constant (< 64 KiB)
    ...
    ...
aaac: db "AAC", 0  ; Advanced Audio Cooling
beef: db "BEEF", 0 ; From cows ...
    

D6fCh: dd 0D6fCh ;label is D6fCh, value is 0D6fCh    

save_file_as:
        invoke  SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
        mov     ebx,eax
        mov     [ei.header.mask],TCIF_PARAM
        invoke  SendMessage,[hwnd_tabctrl],TCM_GETITEM,ebx,ei
        mov     eax,[ei.pszpath]
        or      eax,eax
        jnz     alloc_ok
        invoke  VirtualAlloc,0,1000h,MEM_COMMIT,PAGE_READWRITE
        mov     [ei.pszpath],eax
      alloc_ok:
        mov     [lparam],eax
        mov     [ofn.lpstrFile],eax
        mov     [ofn.lpstrFilter],asm_filter
        mov     [ofn.Flags],OFN_EXPLORER+OFN_HIDEREADONLY+OFN_OVERWRITEPROMPT
   mov [ofn.lpstrTitle],NULL ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        invoke  GetSaveFileName,ofn
    

> this should be fixed.

Could you look into the open DOS IDE problems too
please ?

> A new version of 1.69.32 has been uploaded.

Many silent updates of this 1.69.32 so far