diff --git a/Packages/MIES/MIES_AnalysisBrowser.ipf b/Packages/MIES/MIES_AnalysisBrowser.ipf
index 1e2db96cff..6c16f79630 100644
--- a/Packages/MIES/MIES_AnalysisBrowser.ipf
+++ b/Packages/MIES/MIES_AnalysisBrowser.ipf
@@ -88,7 +88,7 @@ End
 static Function AB_AddMapEntry(baseFolder, discLocation)
 	string baseFolder, discLocation
 
-	variable index, fileID, nwbVersion, dim
+	variable nextFreeIndex, fileID, nwbVersion, dim, writeIndex
 	string dataFolder, fileType, relativePath, extension
 	WAVE/T map = GetAnalysisBrowserMap()
 
@@ -99,21 +99,22 @@ static Function AB_AddMapEntry(baseFolder, discLocation)
 		return -1
 	endif
 
-	index = GetNumberFromWaveNote(map, NOTE_INDEX)
+	nextFreeIndex = GetNumberFromWaveNote(map, NOTE_INDEX)
 	dim = FindDimLabel(map, COLS, "DiscLocation")
-	FindValue/TEXT=""/TXOP=4/RMD=[][dim] map
-	if(V_row < index)
-		index = V_row
+	FindValue/TEXT=""/TXOP=4/RMD=[0, nextFreeIndex - 1][dim] map
+	if(V_row >= 0)
+		writeIndex = V_row
 	else
-		EnsureLargeEnoughWave(map, indexShouldExist=index, dimension=ROWS)
+		writeIndex = nextFreeIndex
+		EnsureLargeEnoughWave(map, indexShouldExist=writeIndex, dimension=ROWS)
 	endif
 
 	// %DiscLocation = full path to file
-	map[index][%DiscLocation] = discLocation
+	map[writeIndex][%DiscLocation] = discLocation
 
 	// %FileName = filename + extension
 	relativePath = RemovePrefix(discLocation, start = baseFolder)
-	map[index][%FileName] = relativePath
+	map[writeIndex][%FileName] = relativePath
 
 	extension = "." + GetFileSuffix(discLocation)
 
@@ -141,19 +142,21 @@ static Function AB_AddMapEntry(baseFolder, discLocation)
 		default:
 			ASSERT(0, "invalid file type")
 	endswitch
-	map[index][%FileType] = fileType
+	map[writeIndex][%FileType] = fileType
 
 	DFREF dfrAB = GetAnalysisFolder()
 	DFREF dfr = dfrAB:$AB_GetUserData(AB_UDATA_WORKINGDF)
 	DFREF expFolder = UniqueDataFolder(dfr, RemoveEnding(relativePath, extension))
 	dataFolder = RemovePrefix(GetDataFolder(1, expFolder), start = GetDataFolder(1, dfrAB))
-	map[index][%DataFolder] = RemoveEnding(dataFolder, ":")
+	map[writeIndex][%DataFolder] = RemoveEnding(dataFolder, ":")
 	RefCounterDFIncrease(expFolder)
 
-	index += 1
-	SetNumberInWaveNote(map, NOTE_INDEX, index)
+	if(writeIndex == nextFreeIndex)
+		nextFreeIndex += 1
+		SetNumberInWaveNote(map, NOTE_INDEX, nextFreeIndex)
+	endif
 
-	return index - 1
+	return writeIndex
 End
 
 static Function AB_RemoveMapEntry(variable index)
@@ -2925,28 +2928,35 @@ Function AB_ButtonProc_AddFiles(ba) : ButtonControl
 				break
 			endif
 			WAVE/T selFiles = ListToTextWave(fileList, "\r")
-			Duplicate/FREE/T selFiles, newFiles
-
-			WAVE/T folderList = GetAnalysisBrowserGUIFolderList()
-			size = DimSize(selFiles, ROWS)
-			for(i = 0; i < size; i += 1)
-				FindValue/TEXT=selFiles[i]/TXOP=4 folderList
-				if(V_Value >= 0)
-					continue
-				endif
-				AB_AddElementToSourceList(selFiles[i])
-				newFiles[index] = selFiles[i]
-				index += 1
-			endfor
-			Redimension/N=(index) newFiles
-
-			AB_AddExperimentEntries(ba.win, newFiles)
+			AB_AddFiles(ba.win, selFiles)
 			break
 	endswitch
 
 	return 0
 End
 
+static Function AB_AddFiles(string win, WAVE/T selFiles)
+
+	variable i, index, size
+
+	Duplicate/FREE/T selFiles, newFiles
+
+	WAVE/T folderList = GetAnalysisBrowserGUIFolderList()
+	size = DimSize(selFiles, ROWS)
+	for(i = 0; i < size; i += 1)
+		FindValue/TEXT=selFiles[i]/TXOP=4 folderList
+		if(V_Value >= 0)
+			continue
+		endif
+		AB_AddElementToSourceList(selFiles[i])
+		newFiles[index] = selFiles[i]
+		index += 1
+	endfor
+	Redimension/N=(index) newFiles
+
+	AB_AddExperimentEntries(win, newFiles)
+End
+
 static Function AB_AddElementToSourceList(string entry)
 
 	variable size
diff --git a/Packages/MIES/MIES_GuiUtilities.ipf b/Packages/MIES/MIES_GuiUtilities.ipf
index 5d4053adac..fad1947471 100644
--- a/Packages/MIES/MIES_GuiUtilities.ipf
+++ b/Packages/MIES/MIES_GuiUtilities.ipf
@@ -1693,6 +1693,36 @@ Function GetListBoxSelRow(win, ctrl)
 	return V_Value
 End
 
+/// @brief Set the listbox selection
+///
+/// @param win  panel
+/// @param ctrl control
+/// @param val  One of @ref ListBoxSelectionWaveFlags
+/// @param row  row index
+/// @param col  [optional, defaults to all columns] column index
+Function SetListBoxSelection(string win, string ctrl, variable val, variable row, [variable col])
+
+	variable colStart, colEnd
+
+	if(ParamIsDefault(col))
+		colStart = 0
+		colEnd   = inf
+	else
+		colStart = col
+		colEnd = col
+	endif
+
+	ControlInfo/W=$win $ctrl
+	ASSERT(V_flag == 11, "Not a listbox control")
+	WAVE/Z selWave = $GetValueFromRecMacro("selWave", S_recreation)
+	ASSERT(WaveExists(selWave), "Missing selection wave")
+
+	ASSERT(row < DimSize(selWave, ROWS), "Invalid row")
+	ASSERT(col < DimSize(selWave, COLS), "Invalid col")
+
+	selWave[row][colStart, colEnd][0][0] = val
+End
+
 /// @brief Check if the location `loc` is inside the rectangle `r`
 Function IsInsideRect(loc, r)
 	STRUCT Point& loc
diff --git a/Packages/tests/HistoricData/UTF_HistoricDashboard.ipf b/Packages/tests/HistoricData/UTF_HistoricDashboard.ipf
index 05640cbe36..b20c6255c0 100644
--- a/Packages/tests/HistoricData/UTF_HistoricDashboard.ipf
+++ b/Packages/tests/HistoricData/UTF_HistoricDashboard.ipf
@@ -53,3 +53,29 @@ Function TestDashboardWithHistoricData([string str])
 	bsPanel = BSP_GetPanel(sbWin)
 	PGC_SetAndActivateControl(bsPanel, "check_BrowserSettings_DS", val = 1)
 End
+
+Function TestAnalysisBrowserAddingFiles()
+
+	string abWin, sweepBrowsers, fileToReadd
+	variable holeIndex
+
+	WAVE/T files = GetHistoricDataFiles()
+	files[] = "input:" + files[p]
+
+	[abWin, sweepBrowsers] = OpenAnalysisBrowser(files)
+
+	PGC_SetAndActivateControl(abWin, "button_collapse_all")
+
+	WAVE/T map = GetAnalysisBrowserMap()
+	CHECK_EQUAL_VAR(GetNumberFromWaveNote(map, NOTE_INDEX), DimSize(files, ROWS))
+
+	holeIndex = 1
+	fileToReadd = map[holeIndex]
+
+	SetListBoxSelection(abWin, "listbox_AB_Folders", LISTBOX_SELECTED, holeIndex)
+	PGC_SetAndActivateControl(abWin, "button_AB_Remove")
+	CHECK_EQUAL_VAR(GetNumberFromWaveNote(map, NOTE_INDEX), DimSize(files, ROWS))
+
+	MIES_AB#AB_AddFiles(abWin, {fileToReadd})
+	CHECK_EQUAL_VAR(GetNumberFromWaveNote(map, NOTE_INDEX), DimSize(files, ROWS))
+End