Your safest option is to . Follow these steps to download version 5.35 from their official archive:

This article will explain why portable versions don't exist, where to safely download v5.35, and how to install it on a USB drive for true on-the-go development.

: Open it with a text editor and look for the line starting with default_userdir default_cachedir Change the paths

Here is the practical guide to making v5.35 run without installation. You will need admin rights once to perform the extraction, but after that, it runs portably.

To actually compile code, you must also download and install the appropriate MPLAB XC Compiler (e.g., XC8 for 8-bit devices) separately, as it is not bundled with the IDE. Creating a "Portable" Workflow

By default, MPLAB X (which is based on the NetBeans platform) stores user settings, plugins, and caches in your system's AppData folder. To make it truly portable, you must force the IDE to write these configurations to your local folder instead. Open your extracted or copied MPLAB X folder. Navigate to mplab_platform\etc\ .

Version 5.35 was built during a transitional phase for operating systems. It retains compatibility with older 32-bit development systems while still operating reliably on modern 64-bit platforms.

Install MPLAB X v5.35 onto a clean system or sandbox environment.