Switched backend of bibliography generator to default

lrftubes.lyx

@@ -32,7 +32,7 @@
 \default_output_format default
 \output_sync 1
 \output_sync_macro "\synctex=1"
-\bibtex_command biber
+\bibtex_command default
 \index_command default
 \paperfontsize default
 \spacing single
@@ -62,8 +62,8 @@
 \cite_engine biblatex
 \cite_engine_type authoryear
 \biblio_style plain
-\biblatex_bibstyle numeric
-\biblatex_citestyle numeric
+\biblatex_bibstyle authoryear
+\biblatex_citestyle authoryear
 \use_bibtopic false
 \use_indices false
 \paperorientation portrait