Not sure why the last several versions of SDRSHARP all crash when tuning or for all sorts of other reasons but it seems to be a problem since 1.0.0.1911.
I have tried all sorts of fixes and nothing worked so I did some research and the last stable version of the program that I could find is 1.0.0.1910, available here. click on the link in "To download the updated MeteorGIS Suite Installer".
extract the sdrsharp folder inside rename your old sdrsharp folder, put this one in the same location as the crashing one, but do not overwrite it. then you can copy your frequencies.xml overwriting the 1910 version. you will have to re-setup the interface and things will be different, and some features missing but at least it won't crash all the time.
other versions available here: https://www.reddit.com/r/RTLSDR/comments/lcxz2f/my_sdr_collection_for_those_who_need_prior/
YOU'RE WELCOME!
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