It is a problem with the specific file name “paid subs, start/end”. The “/” character causes the problem and it is the same on Win7 and Win10. Every ‘favorite’ in SQLyog is saved as a file.
Refer https://kb.acronis.com/content/39790 ” The following characters are invalid as file or folder names on Windows using NTFS: / ? : * | ” and any character you can type with the Ctrl key“. Just try to save any file from any program (Notepad, whatever) with such character in the filename, and you will an “invalid filename” or similar error message. The error message as you see it in SQLyog is returned from the Windows API and not from our code.