The issue could be related to have downloaded numerous RIS files.
When attempting to export references using Chrome browser, users are always prompted to choose a program to open the file. Changing the browser setting to always open the files of the type using Research Soft Export Helper (Win) or EndNote (Mac) does not seem to work.
Check the Chrome downloads folder and clear the old files. When the downloaded files are of same name, Chrome automatically adds a numeric digit next to the file name starting from 1, for example: scholar (39).enw. This seems to fail when the counts exceeds 99, which in turn affects the auto open settings. Deleting the old files resolves the issue.
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