Issues with rigged models when transfering project to a new computer.

I bought a new computer a while ago, and installed Unity version 2019.3.9f1, along with Blender 2.82a. I copied the project from my old computer to my new computer, and all my rigged prefabs are messed up. All the rig bones appear to have incorrect transforms applied to them. The prefabs consist of rigged blender models imported into Unity, and then have joints and colliders on them created with the Unity Ragdoll Wizard. Because the limb transforms are all messed up, the joints and colliders are also affected.

The blender files themselves are fine. The imported blender models in Unity have the messed up limbs initially, but once I go into the Rig tab in Unity Import Settings, and reconfigure them as Humanoid, the models are fixed, but the prefabs and the joints/colliders for the limbs remain with the incorrect transforms.

On my old computer I was using 2018.3, and Blender was 2.72 I believe. All my rigs were working perfectly fine on my old computer, but on this one, they are all screwed up. Any idea what could be causing this? I tried re-configuring the rig, re-importing the prefabs, importing them on a new project, I tried deleting the prefab and re-importing it again after re-configuring the rig, it always produces the same result. I'm not sure if it's the newer Unity version that is causing this, the newer Blender version, or just the project isn't being properly imported on the new computer.

The only solution I have for now is to go in and manually adjust the rig bone transforms on each prefab, and then either rebuild the ragdoll, or manually adjust the colliders and joints. Since I have quite a large number of models, this process is very tedious and could lead to some mistakes here and there. I was wondering if there is some easy fix for this.

Below is an image of what it's supposed to look like:

And here is what it actually looks like: