We do not have a download file for the latest version (5.60.0.556), but you can try downloading it from the developer's site
Download version 3.81.0.377 from Software Informer
Scanned by 76 antivirus programs on Mar 3, 2024.
The file is clean, see the report.
Version: 3.81.0.377 (x86)
Date update: Dec 18, 2014
File name: efficientcalendarfree-setup.exe
Size: 10.5 MB