Downloaded SumatraPDFportable_2.2.1.paf.exe from here & ran the extractor / "installer." It creates 2 executable files for Sumatra - in different sub folders.
One in top folder is SumatraPDFportable.exe.
The other in sub folder "\SumatraPDFPortable\App\sumatrapdf\" is named SumatraPDF.exe. Why two .exe files?
Also, when start Sumatra, both of these.exe files (exact names above) are shown in task mgr. Why two files?