Update verification fails and cannot open

using 4.2.4 ok but newer 4.3 update will not open. Application verification fails due to unknown developer. Mac Maverik OS.

To help you please inform in details on steps you took and the result of each step.

I found it myself. Security setting was set on open only identified developers. Switched to all apps. Opened ok. Changed back to only identified developers and Libre still opens ok without verification. Would be more comforting though if developed recognized by apple. Since its only app that can open old Apple Works docs.