When i tried to import nzb file (double click & import nzb icon from altbinz) that have underscores altbinz rename it and remove the first strings from the nzb!
example: filename is "12_filename_hello.nzb"
altbinz shows it "filename_hello"
NOTE: this problem is happen with all nzb that begin with numbers only then following it underscores, like the above example.
And this option : replace underscores with space when import NZB is disabled. ( also it happens when enabling it )
Tried with the latest version of Altbinz and the old version too ( 0.39.3 )