For those who don't like the new menu, a better solution that only changes the drive section has now been discovered by UKTS poster JustRight. This was done on Windows 8.1.
1 Open Windows Explorer and navigate to your 'RailWorks' directory, wherever did june be.2. Expand the 'RailWorks' folder and you see a folder called shoulderstand' data'3. Expand the 'data' folder.4. In the 'data' folder highlight the 'scale form' directory. Right click on it and select "Rename" .5. Change the name to be 'scaleform.ts2015'6. Now, navigate to your full backup of TS2014. Expand the 'RailWorks' folder and the 'data' folder and highlight the 'scale form' folder.7. Right Click on 'scale form' and select 'Copy' 8. Navigate back to your TS2015 version of 'RailWorks' and expand the 'data' folder.9. Right Click on the 'data' folder and select "Paste" 10th You Should now see a 'scale form' folder inside the 'data' folder.11. Highlight the 'scale form' folder and Right Click on it and select "Rename" .12. Change the name to be 'scaleform.ts2014'13. Now we have backup copies of the base TS1024 and TS2015 menus.14. So, now highlight the 'scaleform.ts2015' folder and Right Click on it and select "Copy" 15th Highlight the 'data' folder and Right Click on it and select "Paste" 16th The Resulting folder will have a name something like 'scaleform.ts2015 - Copy' (DEPENDING on your version of Windows) 17th Highlight the copy 'scaleform.ts2015 - Copy' and Right Click on it and select "Rename" 18th Change the name to be 'scaleform'19. Now, expand the 'scaleform.ts2014' folder.20. Highlight the file 'ScreenFrontEndDrive.swf' and Right Click on it and select "Copy." 21 Highlight the 'scale form' folder and Right Click on it and select "Paste" Windows will ask if you want to overwrite, or replace the file, answer YES.22. With the 'scale form' folder quiet selected.23. Highlight the file 'ScreenFrontEndDriveChoose.swf' and 'Delete' it.24. Highlight the file 'ScreenFrontEndDrive.swf' and Right Click on it and select "Copy" 25. Highlight the 'scale form' folder and Right Click on it and select "Paste" 26. The Resulting file will have a name something like 'Screen frontend Drive - Copy.swf' (DEPENDING on your version of Windows) 27. Highlight the copy 'frontend Screen Drive - Copy.swf' and Right Click on it and select "Rename" 28. Change the name to be 'ScreenFrontEndDriveChoose.swf' 29. Finally, take a copy of the new, modified, 'scale form' folder and put it somewhere safe in case an update Reverts synthesis changes. I had already changed by the previous method but later I will try this and see what I prefer.