diff --git a/src/libslic3r/Format/SL1.cpp b/src/libslic3r/Format/SL1.cpp
index 6d779b94e..e2ef801f2 100644
--- a/src/libslic3r/Format/SL1.cpp
+++ b/src/libslic3r/Format/SL1.cpp
@@ -203,7 +203,7 @@ RasterParams get_raster_params(const DynamicPrintConfig &cfg)
 
     if (!opt_disp_cols || !opt_disp_rows || !opt_disp_w || !opt_disp_h ||
         !opt_mirror_x || !opt_mirror_y || !opt_orient)
-        throw Slic3r::FileIOError("Invalid SL1 file");
+        throw Slic3r::FileIOError("Invalid SL1 / SL1S file");
 
     RasterParams rstp;
 
@@ -229,7 +229,7 @@ SliceParams get_slice_params(const DynamicPrintConfig &cfg)
     auto *opt_init_layerh = cfg.option<ConfigOptionFloat>("initial_layer_height");
 
     if (!opt_layerh || !opt_init_layerh)
-        throw Slic3r::FileIOError("Invalid SL1 file");
+        throw Slic3r::FileIOError("Invalid SL1 / SL1S file");
 
     return SliceParams{opt_layerh->getFloat(), opt_init_layerh->getFloat()};
 }
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 267ea602f..5f74a7265 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -234,7 +234,7 @@ void PrintConfigDef::init_common_params()
 
     def = this->add("thumbnails", coPoints);
     def->label = L("G-code thumbnails");
-    def->tooltip = L("Picture sizes to be stored into a .gcode and .sl1 files, in the following format: \"XxY, XxY, ...\"");
+    def->tooltip = L("Picture sizes to be stored into a .gcode and .sl1 / .sl1s files, in the following format: \"XxY, XxY, ...\"");
     def->mode = comExpert;
     def->gui_type = ConfigOptionDef::GUIType::one_string;
     def->set_default_value(new ConfigOptionPoints());
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index b496c846d..53b07728e 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -435,7 +435,7 @@ wxString file_wildcards(FileType file_type, const std::string &custom_extension)
 
         /* FT_TEX */     "Texture (*.png, *.svg)|*.png;*.PNG;*.svg;*.SVG",
 
-        /* FT_PNGZIP */  "Masked SLA files (*.sl1)|*.sl1;*.SL1",
+        /* FT_PNGZIP */  "Masked SLA files (*.sl1, *sl1s)|*.sl1;*.SL1;*.sl1s;*.SL1S",
     };
 
 	std::string out = defaults[file_type];
diff --git a/src/slic3r/GUI/Jobs/SLAImportJob.cpp b/src/slic3r/GUI/Jobs/SLAImportJob.cpp
index fe429e314..6a22c9130 100644
--- a/src/slic3r/GUI/Jobs/SLAImportJob.cpp
+++ b/src/slic3r/GUI/Jobs/SLAImportJob.cpp
@@ -33,7 +33,7 @@ public:
         
         m_filepicker = new wxFilePickerCtrl(this, wxID_ANY,
                                             from_u8(wxGetApp().app_config->get_last_dir()), _(L("Choose SLA archive:")),
-                                            "SL1 archive files (*.sl1, *.zip)|*.sl1;*.SL1;*.zip;*.ZIP",
+                                            "SL1 archive files (*.sl1, *.sl1s, *.zip)|*.sl1;*.SL1;*.sl1s;*.SL1S;*.zip;*.ZIP",
                                             wxDefaultPosition, wxDefaultSize, wxFLP_DEFAULT_STYLE | wxFD_OPEN | wxFD_FILE_MUST_EXIST);
         
         szfilepck->Add(new wxStaticText(this, wxID_ANY, _L("Import file") + ": "), 0, wxALIGN_CENTER);
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 93641adff..ddf8e6acb 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -1188,7 +1188,7 @@ void MainFrame::init_menubar_as_editor()
             [this](wxCommandEvent&) { if (m_plater) m_plater->add_model(true); }, "import_plater", nullptr,
             [this](){return m_plater != nullptr; }, this);
         
-        append_menu_item(import_menu, wxID_ANY, _L("Import SL1 archive") + dots, _L("Load an SL1 archive"),
+        append_menu_item(import_menu, wxID_ANY, _L("Import SL1 / SL1S archive") + dots, _L("Load an SL1 / Sl1S archive"),
             [this](wxCommandEvent&) { if (m_plater) m_plater->import_sl1_archive(); }, "import_plater", nullptr,
             [this](){return m_plater != nullptr; }, this);    
     
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index e74a271b4..c73233d6b 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -5303,7 +5303,7 @@ void Plater::export_gcode(bool prefer_removable)
 
     fs::path output_path;
     {
-        wxFileDialog dlg(this, (printer_technology() == ptFFF) ? _L("Save G-code file as:") : _L("Save SL1 file as:"),
+        wxFileDialog dlg(this, (printer_technology() == ptFFF) ? _L("Save G-code file as:") : _L("Save SL1 / SL1S file as:"),
             start_dir,
             from_path(default_output_file.filename()),
             GUI::file_wildcards((printer_technology() == ptFFF) ? FT_GCODE : FT_PNGZIP, default_output_file.extension().string()),
diff --git a/src/slic3r/Utils/OctoPrint.cpp b/src/slic3r/Utils/OctoPrint.cpp
index f01e3ad41..ee669c36f 100644
--- a/src/slic3r/Utils/OctoPrint.cpp
+++ b/src/slic3r/Utils/OctoPrint.cpp
@@ -182,7 +182,7 @@ const char* SL1Host::get_name() const { return "SL1Host"; }
 
 wxString SL1Host::get_test_ok_msg () const
 {
-    return _(L("Connection to Prusa SL1 works correctly."));
+    return _(L("Connection to Prusa SL1 / SL1S works correctly."));
 }
 
 wxString SL1Host::get_test_failed_msg (wxString &msg) const