I've done everything the tutorials said and when i type "export2bin"  on cmd.exe it works.

I think you can just drag the anim file onto the exe file and it will auto convert for you. What you're doing wrong is that the export2bin exe isn't in the folder you're using cd to access, but in system 32. So, either just drag the file or do:

cd C:\WINDOWS\system32
export2bin E:\Pablo\Mod Tools\Exports\M1911\anims\yourfilename.extension

Make sure to change yourfilename.extension to the filename you're using