Please try the following.
■Re-sync the library
Please try updating the library by clicking "Re-sync library" in the upper right.
■Reinstall DLsite Nest
Follow these directions to reinstall the app.
- Exit out of NEST via the Windows task tray at the bottom right.
- Uninstall DLsite Nest.
- Download the latest version from the About DLsite Nest page.
- Install the newly-downloaded version of DLsite Nest.