Module update for Regnessem Alpha Release 16

[Module Name]
SimpleUI.dll

[Version]
0.1.15a

[How to update]
Exit Regnessem before updating. Then, please copy SimpleUI.dll into Plugins folder,
which is located inside the folder where Regnessem is installed.

[Updates]
Fix following problems:
- EListError occurs when switching between tabs after changing the theme.
- Double-clicking the task tray icon resizes maximized windows to the normal size.
