Sorry for the repeat question. For some reason, my previous query of this disappeared.
Fortunately, I found an answer to this in my email. \xdc (and \fdc) are now discouraged and \dc ... \dc* are preferred.
Thanks @Phil_Leckrone for responding previously.
So,
\x - \xo 11:5 \xk Henog ... weggeneem het: \xt Gen 5:24 \xta (volgens die •Septuagint); \xdc Sir 44:16; Wys 4:10; \xq 1 Hen \xta 70:1-4 •Pseudepigrawe\x*
changes to
\x - \xo 11:5 \xk Henog ... weggeneem het: \xt Gen 5:24 \xta (volgens die •Septuagint)\xt \+dc ; Sir 44:16; \+dc*\xta \+dc Wys 4:10; 1 Hen 70:1-4 •Pseudepigrawe\+dc*\x*