Improve GPU function

source/par2j/Command_par2j.txt

@@ -1,4 +1,4 @@
-[ par2j.exe - version 1.3.3.0 or later ]
+[ par2j.exe - version 1.3.3.1 or later ]
 
 Type "par2j.exe" to see version, test integrity, and show usage below.
 
@@ -367,10 +367,10 @@ The format is "/lc#" (# is from 1 to 32 as the number of using threads).
 253: It uses 3/4 number of physical Cores.
 254: It uses one less threads than number of physical Cores.
   0: It uses the number of physical Cores.
-255: It uses one more threads than number of physical Cores.
+255: It tries to use more threads than number of physical Cores.
 
  You may set additional combinations;
-+1024 to disable CLMUL (and use old SSSE3 code), 
++1024 to disable CLMUL (and use slower SSSE3 code), 
 +2048 to disable JIT (for SSE2), 
 +4096 to disable SSSE3,
 +8192 to disable AVX2,