Downloading uCProbe 3.5.15.410 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Development Tools. We recommend checking the downloaded files with any free antivirus. The most popular versions of the uCProbe are 3.5, 3.3 and 3.2. The actual developer of the software is Micrium Inc.
From the developer:
µC/Probe graphically visualizes the internals of an embedded system. This application works with a wide variety of embedded processors, and supports communication via J‑Link, CMSIS-DAP, Cypress PSoC Prog, TCP/IP, USB, RS-232, or proxies such as the IAR Systems Embedded Workbench Plugin for µC/Probe or the Eclipse Plugin for µC/Probe.
You may want to check out more software, such as uC-Probe, which might be related to uCProbe.