Knowledge Base:  

Knowledge Base : updating
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Updates for Version 4
We apologize for the difficulty you experienced updating the Version 4 programmer. This will get the update completed now. In the future, the programmer will check automatically every 30 days so
Updates for Version 5

We apologize for the difficulty you experienced updating the Version 5 programmer. This will get the update completed now. In the future, the programmer will check automatically every 30 days
Updates for Version 3
This will get the update completed now for the version 3 programmers installed on your computer to the latest version 3 build. Before you begin, be sure none of the RT Systems programmers are
ID 5100 Firmware E3 upgrade
On May 22, 2015, Icom issued a firmware upgrade for the ID-5100 radio. RT Systems was made aware of this upgrade on May 22. On that day we began changing the WCS-D5100 programmer to address the change
Updating Version 4 after failure

You have to ensure no compatibility settings are active, allow the program full access in McAfee, and briefly turn off Windows Firewall.   If the program update fails, you have to re-install