In the Script Editor, the character ^ makes FinalBuilder not respond when the language PowerShell is selected. It doesn’t matter if you type it, paste or switch from another language having it written beforehand.
I can reproduce it here - very strange - looking into it.
The bug was an infinite loop in the syntax highlighter. This build has the fix
https://downloads.finalbuilder.com/downloads/finalbuilder/800/FB800_3128.exe
Downloaded, tested and working. Thank you!