Just a hint:

you can have as many different versions of Blender on your computer as you want. Grab the portable version (.zip archive, not the installer) that works for you and tansfer your dollies always using this one. Save the .blend and either re-open it in your default Blender or append / link its content into a new scene.

All released Blender-versions can be found here: download.blender.org/release/

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~ it's always darkest before the dawn will show ~