diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2a061bf06..b405bcce9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,6 +41,7 @@ option(SLIC3R_MSVC_COMPILE_PARALLEL "Compile on Visual Studio in parallel" 1)
 option(SLIC3R_MSVC_PDB          "Generate PDB files on MSVC in Release mode" 1)
 option(SLIC3R_PERL_XS           "Compile XS Perl module and enable Perl unit and integration tests" 0)
 option(SLIC3R_ASAN              "Enable ASan on Clang and GCC" 0)
+option(SLIC3R_ALPHA             "Development/Experimental version; use separate profile directory." OFF)
 
 set(SLIC3R_GTK "2" CACHE STRING "GTK version to use with wxWidgets on Linux")
 
diff --git a/src/libslic3r/CMakeLists.txt b/src/libslic3r/CMakeLists.txt
index cd329c334..528841aba 100644
--- a/src/libslic3r/CMakeLists.txt
+++ b/src/libslic3r/CMakeLists.txt
@@ -347,6 +347,8 @@ if(SLIC3R_PROFILE)
     target_link_libraries(libslic3r Shiny)
 endif()
 
+target_compile_definitions(libslic3r PRIVATE $<$<BOOL:${SLIC3R_ALPHA}>:SLIC3R_ALPHA>)
+
 if (SLIC3R_PCH AND NOT SLIC3R_SYNTAXONLY)
     add_precompiled_header(libslic3r pchheader.hpp FORCEINCLUDE)
 endif ()
diff --git a/src/slic3r/CMakeLists.txt b/src/slic3r/CMakeLists.txt
index 3c8769ed5..452cb2f68 100644
--- a/src/slic3r/CMakeLists.txt
+++ b/src/slic3r/CMakeLists.txt
@@ -1,6 +1,12 @@
 cmake_minimum_required(VERSION 3.13)
 project(libslic3r_gui)
 
+if(NOT WIN32)
+    # Add DEBUG flags to debug builds.
+    add_compile_options(${_CC_DEBUG_FLAGS})
+endif()
+
+
 include(PrecompiledHeader)
 
 set(SLIC3R_GUI_SOURCES
@@ -247,6 +253,7 @@ if (APPLE)
 endif ()
 
 add_library(libslic3r_gui STATIC ${SLIC3R_GUI_SOURCES})
+target_compile_definitions(libslic3r_gui PRIVATE $<$<BOOL:${SLIC3R_ALPHA}>:SLIC3R_ALPHA>)
 
 encoding_check(libslic3r_gui)
 
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 43e6eb382..e1ece8ad9 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -700,9 +700,12 @@ bool GUI_App::init_opengl()
 
 void GUI_App::init_app_config()
 {
-	// Profiles for the alpha are stored into the PrusaSlicer-alpha directory to not mix with the current release.
-//	SetAppName(SLIC3R_APP_KEY);
-	SetAppName(SLIC3R_APP_KEY "-alpha");
+    #ifdef SLIC3R_ALPHA
+        // Profiles for the alpha are stored into the PrusaSlicer-alpha directory to not mix with the current release.
+	    SetAppName(SLIC3R_APP_KEY "-alpha");
+    #else 
+    	SetAppName(SLIC3R_APP_KEY);
+    #endif
 //	SetAppDisplayName(SLIC3R_APP_NAME);
 
 	// Set the Slic3r data directory at the Slic3r XS module.