The recommended approach to install the mod on 1.32 (Old Gen) is to proceed with a manual installation. This page will guide you through the process in an in-depth manner so that even newcomers can follow it.
How to install the dependencies and why Random Encounters Reworked needs them, and in which cases you could skip this step.
How to actually install Random Encounters Reworked.
Merging instructions for known conflicts
If one of the mods you use is in the list below then use the mod specific instructions, otherwise merge everything that includes a sharedutils mod.
Note: the instructions assume you have no custom priority on any of your mods, but if you do then you'll have to ensure Shared Imports is always loaded first (its name shouldn't be greyed in the script merger window).
Mod specific instructions:
What each keybind does and how to add them to your game
Once all this is done, you can finally remerge your scripts.