Modify the trial period of Eudic

choose your tools to modify the plist file

I choose VSCode, and install extension Binary Plist

edit the property MAIN_TimesLeft

search and find the property MAIN_TimesLeft in plist file ~/Library/Preferences/com.eusoft.eudic.plist, then edit the attribute value to an integer which means the left days of trial period, for example, 36500 (100 years).