V4.3.1:

Wellon USB Driver support WINDOWS_7\Vista 32/64bit Version(WHQL)(8/7/2010);

V4.3.0:

GP-20 VP-990 support devices over 52000(24/5/2010);

GP-20 VP-990 support devices over 50000(16/3/2010);

support WINDOWS_7\Vista\XP 64bit Version(9/12/2009);

V4.2.0:

VP-990 support devices over 48000(20/11/2009);

VP-990 support devices over 47000(4/11/2009);

VP-990 support devices over 44000(5/8/2009);

VP-990 support devices over 41000(5/5/2009);

VP-990 support devices over 39000(23/2/2009);

V4.1.0:

VP-980 support devices over 36000(28/8/2008);

support VP-290 VP-990

V4.0.0:

VP-980 support devices over 35000(29/7/2008);

support language portuguese(30/5/2008)

VP-980 support devices over 34000(22/6/2008);

support SVF file;support VP-190

V3.9.8:

VP-980 support devices over 26000;

add device:TMS370 series.

V3.9.7:

VP-980\880 support devices over 24000;

V3.9.6:

VP-980\880 support devices over 23000;

V3.9.5:

support language Korean;Poland;Italian;Dutch;

V3.9.4:

update menu;

V3.9.3:

Updated USB driver;WELLON programmer series can make a computer operated multiple programmer simultaneously.

VP-880 support devices over 20000;

V3.9.0:

"edit buffer" add checksum calculate and insert;