diff --git a/MASH-FRET/.release_version.json b/MASH-FRET/.release_version.json
index 6877875c..53d0dcfc 100644
--- a/MASH-FRET/.release_version.json
+++ b/MASH-FRET/.release_version.json
@@ -1,4 +1,4 @@
 {
 "tag" : ".1.3.4",
-"prev_commit_hash" : "2a9ca2a7"
+"prev_commit_hash" : "240b0d99"
 }
diff --git a/MASH-FRET/source/mod-trace-processing/_callbacks/pushbutton_TP_pbSplit_Callback.m b/MASH-FRET/source/mod-trace-processing/_callbacks/pushbutton_TP_pbSplit_Callback.m
index f5867be9..ae1619c1 100644
--- a/MASH-FRET/source/mod-trace-processing/_callbacks/pushbutton_TP_pbSplit_Callback.m
+++ b/MASH-FRET/source/mod-trace-processing/_callbacks/pushbutton_TP_pbSplit_Callback.m
@@ -69,6 +69,9 @@ function pushbutton_TP_pbSplit_Callback(obj,evd,h_fig)
 if ~isempty(p.proj{proj}.S_DTA)
     p.proj{proj}.S_DTA = p.proj{proj}.S_DTA(:,s_id);
 end
+if ~isempty(p.proj{proj}.FRET_DTA_import)
+    p.proj{proj}.FRET_DTA_import = p.proj{proj}.FRET_DTA_import(:,fret_id);
+end
 p.proj{proj}.bool_intensities = p.proj{proj}.bool_intensities(:,mol_id);
 p.proj{proj}.dt = {};
 p.proj{proj}.molTag = p.proj{proj}.molTag(mol_id,:);
@@ -132,6 +135,9 @@ function pushbutton_TP_pbSplit_Callback(obj,evd,h_fig)
 if ~isempty(p.proj{proj}.S_DTA)
     p.proj{proj}.S_DTA(:,[s_id_n,s_id_dup],:) = NaN;
 end
+if ~isempty(p.proj{proj}.FRET_DTA_import)
+    p.proj{proj}.FRET_DTA_import(:,[fret_id_n,fret_id_dup],:) = NaN;
+end
 
 % set right side of the original trace to NaN
 p.proj{proj}.intensities(frames_right,chan_id_n,:) = NaN;