diff --git a/Viewer/cfg/requirejs.js b/Viewer/cfg/requirejs.js
index 9fbc6e12..1cb9dcd6 100644
--- a/Viewer/cfg/requirejs.js
+++ b/Viewer/cfg/requirejs.js
@@ -35,7 +35,10 @@ var setup = function(require, root){
 				(require.main ?
 					require.main.filename.split(/[\\\/]/g).slice(0, -1).join('/')
 					: document.baseURI
-						.replace(/^[a-zA-Z]+:\/\/\/?/, '')
+						// remove URL protocol...
+						.replace(/^[a-zA-Z]+:\/\/\/?/, '/')
+						// remove leading '/' on windows drives...
+						.replace(/^\/[a-zA-Z]:/, '')
 						.split(/[#&]/)[0].split(/[\\\/]/g).slice(0, -1).join('/'))
 			:  '.',
 
diff --git a/Viewer/doc/HACKS b/Viewer/doc/HACKS
index c49f2c9f..6a17a6e1 100644
--- a/Viewer/doc/HACKS
+++ b/Viewer/doc/HACKS
@@ -11,6 +11,8 @@ Hacks and fixes
 - cfg/requirejs.js:
 	.baseUrl calculation under U*IX systems needs a '/' prefixed...
 
+Both issues are currently tweaked manually...
+
 
 
 20210122:
diff --git a/Viewer/version.js b/Viewer/version.js
index e149e4ac..804364ca 100644
--- a/Viewer/version.js
+++ b/Viewer/version.js
@@ -13,7 +13,7 @@
 // 				> node version.js
 // 			- browser + requirejs + file://
 // 			- browser + requirejs + http*
-var VERSION = '4.0.0a'
+var VERSION = '4.0.1a'
 
 //console.log(VERSION)