Overwriting hard-space causes crash
1. You can use default sheet
2. Enter at least two notes
3. Under first note type text containing hard space (using [TAB] or [Ctrl]+[Spacebar]) i.e. "ab cd" and any syllable under another one.
4. Select (highlight) hard space and type the underscore "_" (now there should be low line between those syllables)
5. Select (highlight) hard space once again and enter any letter to overwrite the space.