This version has been nothing but headaches, for me anyway. It’s unstable and frequently freezes.
Try then the latest v10.0.3447 via the release history page and see if that fixes it.
Close eM Client before updating and also make a backup first incase you need to restore for any reason via “Menu / Backup” (Pc) or “File / Backup” (Mac).
If that still is unstable or freezing on your computer that can sometimes then be related to eg: background tasks resident sometimes interfering with the mail client.
Programs that can sometimes interfere are eg: Optionally installed Firewall / Security programs, or Optionally installed Antivirus programs or VPN’s. So if you have anything like that installed other than what comes default with the OS, try completely disabling those to test.
Apart from that if nothing else running resident like that and the new v10.0.3447 update makes no difference to the issue and is still freezing, then see this post from @Olivia_Rust where you can then send in logs to be diagnosed.