I am running LrC 10.1 on a Mac with Mojave. Today I loaded an old ctatalog, was asked to upgrade the catalog and I did. LrC opened, but it opened to an old version of LR. Howver, About Lightroom shows I am running 10.1. My identity plate reverted to an old plate, and the develop module is dated, no white level, no texture, no dehaze, etc. This is what it now looks like:
I went to creative cloud, loaded 10.0...same thing; I updated to 10.1, same thing. About Lightroom is showing 10.1.
I really would not want to uninstall and reinstall as I have lots of custom presets, and would that even address the issue?
I did that. I went into CreativeCld, under Lightroom Classic I went to "other versions," installed 10.0, checked it...same problem. I then updated to 10.1, same issue.
But here is something strange, I've been playing with it. If I open a newer catalog, one from 2020, LrC opens properly. I can then import the older photo and the LrC version display stays proper with the newer display showing dehaze, white level etc.
Maybe older catalogs -- the one I was opening was from 2011-- if opened from the LRCAT file opens the version of LR used originally for that photo???