v3.0.1

Updated content:

Fixed Problems:

• The disappearance of color on preview text when switching modes.
• When the dest is blank in a Clean Desktop saving, error prompt wouldn't show up when reading it.
• The folder with same name couldn't be replaced in the target when cleaning desktop.
• The path replacing error in Syncfile preview textbox that happens when the two paths are similar
• Some configs wasn't read in utf-8 and caused problems when reading them again after saving.

Some refactorings applied