I tried to use ida with older signature sspro.sig and it found few functions(20) but none of the sspro functions.

I get only one known good function is following:

RNBOsproCleanup() ; __stdcall RNBOsproCleanup()
RNBOsproCleanup() _RNBOsproCleanup@0 proc near ; CODE XREF: sub_44C760+4Fp
RNBOsproCleanup()
RNBOsproCleanup() ; FUNCTION CHUNK AT .text:004420D0 SIZE 00000024 BYTES
RNBOsproCleanup()
RNBOsproCleanup() E8 xx xx xx xx call sub_xxxxx0 ; Call Procedure
RNBOsproCleanup()+5 E8 xx xx xx xx call sub_xxxxx0 ; Call Procedure
RNBOsproCleanup()+A E8 xx xx xx xx call sub_xxxxxx0 ; Call Procedure
RNBOsproCleanup()+F E8 xx xx xx xx call sub_xxxxx0 ; Call Procedure
RNBOsproCleanup()+14 E8 xx xx xx xx call sub_xxxxx0 ; Call Procedure
RNBOsproCleanup()+19 E9 xx xx xx xx jmp loc_xxxxx0 ; Jump
RNBOsproCleanup()+19 _RNBOsproCleanup@0 endp
RNBOsproCleanup()+19
RNBOsproCleanup()+19 ; ----------------------------------------------------------

Can any one help any more pointer or has newer signature file?