Yes, replace the file /Applications/Skim.app/Contents/SharedSupport/displayline with the file above which unfortunately has a [ instead of { in the penultimate line ${activate}
You can revert to previous version with this link https://sourceforge.net/projects/skim-app/files/Skim/Skim-1.4.36/Skim-1.4.36.dmg/download
Just to confirm the bug, very annoying. As you fixed it, could you release the release very soon? Best regards