Ver 5.0
+ Supports AutoCAD R2010 format drawing files now.

Ver 4.9
+ Supports AutoCAD R2007 format drawing files now.

Ver 4.8
+ Supports PSD format file now
+ Supports cut to clipboard function now
+ Can rename the file name directly
+ Can create new folder now
- Some bugs fixed

Ver 4.73
- fixed crashbug when loading preview from some dwg.

Ver 4.72
+ added 0 width thumbnail style.
- some bug fixed.

Ver 4.71
+ Improved performance and stableness

Ver 4.7
- Trial bug fixed.
+ Improved performance and stableness

Ver 4.6
- Trial bug fixed.

Ver 4.5
- Trial bug fixed.

Ver 4.0
+ Supports the following raster image files: *.bmp, *.jpg, *.gif, *.pcx, *.tif, *.png, *.mng, *.ico, *.tga, *.wbmp, *.wmf, *.emf
+ Improved performance and stableness

Ver 3.6
+ Supports xref block of R2004/2005 format drawing file.
+ Supports DWF format file.

Ver 3.5
+ Supports AutoCAD R2004/2005 format drawing files now.