I can not Use or Remove Dmaths. Extension Manager shows DmathsAddon.oxt and "Remove" window.

[BillL]

1. LO Version: 4.4.4, and 5.0.0.3, Language: En-GB, Components: soffice, swriter, scalc, smath (Extension Manager);
2. OS: Win 7, Language: En-GB;
3. During attempt to remove DmathsAddon.oxt, the following Message from Extension Manager: (com.sun.star.lang.IllegalArgumentException) { { { Message = “There is no such extension deployed: org.openoffice.legacy.DmathsAddon.oxt”, Context = (com.sun.star.uno.XInterface) @9c6e730 } }, ArgumentPosition = (short) -1 }