diff --git a/src-core/handlers/product/image_product_handler.h b/src-core/handlers/product/image_product_handler.h
index ebff57804..2845a4703 100644
--- a/src-core/handlers/product/image_product_handler.h
+++ b/src-core/handlers/product/image_product_handler.h
@@ -71,10 +71,10 @@ namespace satdump
 
             void saveResult(std::string directory);
 
-            void addSubHandler(std::shared_ptr<Handler> handler)
+            void addSubHandler(std::shared_ptr<Handler> handler, bool ontop = false)
             {
-                // Handler::addSubHandler(handler);
-                img_handler->addSubHandler(handler);
+                // Handler::addSubHandler(handler, ontop);
+                img_handler->addSubHandler(handler, ontop);
             }
 
             void delSubHandler(std::shared_ptr<Handler> handler, bool now = false)
diff --git a/src-core/handlers/product/punctiform_product_handler.h b/src-core/handlers/product/punctiform_product_handler.h
index ce0e4345c..fca8a3af1 100644
--- a/src-core/handlers/product/punctiform_product_handler.h
+++ b/src-core/handlers/product/punctiform_product_handler.h
@@ -43,7 +43,7 @@ namespace satdump
             void drawMenuBar();
 
             //
-            void addSubHandler(std::shared_ptr<Handler> handler) { img_handler.addSubHandler(handler); }
+            void addSubHandler(std::shared_ptr<Handler> handler, bool ontop = false) { img_handler.addSubHandler(handler, ontop); }
 
             void delSubHandler(std::shared_ptr<Handler> handler, bool now = false) { img_handler.delSubHandler(handler, true); }
 
diff --git a/src-core/handlers/trash/trash_handler.h b/src-core/handlers/trash/trash_handler.h
index 7564604b9..dd2dd515b 100644
--- a/src-core/handlers/trash/trash_handler.h
+++ b/src-core/handlers/trash/trash_handler.h
@@ -30,7 +30,7 @@ namespace satdump
             void setConfig(nlohmann::json p);
             nlohmann::json getConfig();
 
-            void addSubHandler(std::shared_ptr<Handler> handler)
+            void addSubHandler(std::shared_ptr<Handler> handler, bool ontop = false)
             {
                 // Do nothing!
             }
diff --git a/src-interface/explorer/explorer.cpp b/src-interface/explorer/explorer.cpp
index bbfa6f56d..b3bcf2df8 100644
--- a/src-interface/explorer/explorer.cpp
+++ b/src-interface/explorer/explorer.cpp
@@ -83,11 +83,7 @@ namespace satdump
                 });
         }
 
-        ExplorerApplication::~ExplorerApplication()
-        {
-            if (file_open_thread.joinable())
-                file_open_thread.join();
-        }
+        ExplorerApplication::~ExplorerApplication() {}
 
         void ExplorerApplication::drawPanel()
         {
@@ -252,8 +248,6 @@ namespace satdump
 
         void ExplorerApplication::tryOpenFileInExplorer(std::string path)
         {
-            if (file_open_thread.joinable())
-                file_open_thread.join();
             auto fun = [this, path]()
             {
                 eventBus->fire_event<SetIsProcessingEvent>({});
@@ -321,7 +315,7 @@ namespace satdump
 
                 eventBus->fire_event<SetIsDoneProcessingEvent>({});
             };
-            file_open_thread = std::thread(fun);
+            file_open_queue.push(fun);
         }
     } // namespace explorer
 }; // namespace satdump
diff --git a/src-interface/explorer/explorer.h b/src-interface/explorer/explorer.h
index 1d15b6179..4546d6375 100644
--- a/src-interface/explorer/explorer.h
+++ b/src-interface/explorer/explorer.h
@@ -3,6 +3,7 @@
 #include "../app.h"
 
 #include "common/widgets/menuitem_fileopen.h"
+#include "dsp/task_queue.h"
 #include "handlers/handler.h"
 
 #include "imgui/dialogs/widget.h"
@@ -40,7 +41,7 @@ namespace satdump
 
             // File open
             widget::MenuItemFileOpen file_open_dialog;
-            std::thread file_open_thread; // TODOREWORK?
+            TaskQueue file_open_queue;
 
             std::string quickOpenString;
 
diff --git a/src-interface/explorer/processing/processing.cpp b/src-interface/explorer/processing/processing.cpp
index aaad9f2b6..e14eb9a68 100644
--- a/src-interface/explorer/processing/processing.cpp
+++ b/src-interface/explorer/processing/processing.cpp
@@ -44,6 +44,8 @@ namespace satdump
 
         void OffProcessingHandler::process(pipeline::Pipeline downlink_pipeline, std::string input_level, std::string input_file, std::string output_file, nlohmann::json parameters)
         {
+            eventBus->fire_event<SetIsProcessingEvent>({});
+
             pipeline_name = downlink_pipeline.name;
 
             logger->info("Starting processing pipeline " + downlink_pipeline.id + "...");
@@ -89,6 +91,8 @@ namespace satdump
             }
 
             pipeline_name = "PROCESSING_DONE"; // TODOREWORK MASSIVE HACK!
+
+            eventBus->fire_event<SetIsDoneProcessingEvent>({});
         }
 
         void OffProcessingHandler::drawMenu() {}