Following error messages are obtained when the editor is opened from inside the STAAD.Pro CE in Windows 7 OS after a recent Windows update
Steps to Reproduce
Open the editor from the Utilities ribbon menu inside STAAD.Pro CE.
The Unhandled Exception messages show up
The error is being caused by a defect in one of the Windows Updates on Win7SP1 OS which corrupted one of the Windows font files. The solution is to manually replace the corrupted font file with correct version following the steps outlined below.
More details on this issue are provided at the page https://github.com/dotnet/announcements/issues/53