Can you please let us know if any of the below workarounds help:
1. On refreshing the contents of the folder (where these indesign files and idml are saved), the icons of indd and idml files should appear again
2. On the 2nd launch of InDesign the folder icons should reappear.
An error occurred while saving the commentDavid commented
Windows file icons disappear after update (14.0.2 x64) resulting in blank white icons, but files are still associated with InDesign.David supported this idea ·