I had to find those engraving rules in the English version to answer the question
- That option only applies to complete beats in compound time signatures, so it doesn’t apply in 5/4 times.
If you don’t want double-dotted rests, change the values in Notation Option / Note Grouping / Rhythm dots (which apply to both notes and rests).
- By default, 5/4 in Dorico is beamed as 3+2/4, so the “beats” are a dotted half note and a half note, not quarter notes. If you want each quarter note beamed separately, you can enter the time signature as [1+1+1+1+1]/4.