after installing excel 2016, i can not read files in excel 2010

[chopin007]

After installing excel  2016 , some files in excel  2010 can't be opened anymore

[#2]

Hello! Can you pls. specify, which file types you cannot open? If it’s xlsm or xlsa, there might be code (vba) within those files. Where are the files stored? Which error messages do you receive? Greets, Eva