Revise StringPE docs home page: index.md

Minor text revisions.
Provide links for release v2 on GitHub
Update link for releases v1 & v2 on SourceForge.

Update internal links re changed directory structure.

Author: delphidabbler

StringPE/index.md

@@ -4,12 +4,13 @@ This document forms the user guide for the Extended String Property Editor.
 
 There are two versions of this property editor, each of which is documented separately:
 
-* [User guide for version 1](./StringPE/UserGuideV1.md)
-* [User guide for version 2](./StringPE/UserGuideV2.md)
+* [User guide for version 1](./1/UserGuide.md)
+* [User guide for version 2](./2/UserGuide.md)
 
 ## Links
 
 * Back to [Documentation Home Page](../index.md)
-* [Property Editor web page](https://delphidabbler.com/software/stringpe) -- Install notes, change log, license etc.
-* [Downloads](https://sourceforge.net/projects/ddablib/files/stringpe/) -- Download current version here.
-* [Source code](https://github.com/ddablib/stringpe) -- Current development tree.
+* [Property Editor web page](https://delphidabbler.com/software/stringpe)
+* [Releases (v2 only)](https://github.com/ddablib/stringpe/releases) -- GitHub
+* [Releases (v1 & v2)](https://sourceforge.net/projects/ddablib/files/stringpe/) -- SourceForge
+* [Source code](https://github.com/ddablib/stringpe)