Here are the files for replacement: fix-tab-issue.zip (for v2.1.5)
The files must replace the ones at a folder like this: c:\Program Files\wings3d_2.1.5\lib\wings-2.1.5\ebin
The files must replace the ones at a folder like this: c:\Program Files\wings3d_2.1.5\lib\wings-2.1.5\ebin