DL4c 1.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This PC software works fine with 32-bit versions of Windows XP/7/10/11. The actual developer of the free software is McElroy. The most popular version among the program users is 1.0. Commonly, this program's installer has the following filename: DL4c.exe. The software belongs to System Utilities. We recommend checking the downloaded files with any free antivirus.
From the developer:
DL4c is the desktop companion for the McElroy DataLogger® 4. It allows joint reports generated by the McElroy DataLogger® to be displayed on your Windows PC and printed to a printer connected to your PC. To view reports on your PC screen, click File > Open. Navigate to the Joint Reports folder and select a previously downloaded report.
You may want to check out more software, such as EOS Utility, iPHUC for Windows or SoftX Internet Logger, which might be related to DL4c.