rebel007
The Start Menu is currently limited to 500 items — and every single link inside the classic Windows 7 Start Menu counts as “one item.” This could cause real problems for upgraders since the same database that holds the 500 items to display, also controls search results. This means that if you install applications 501 – 510, hit Start, and start typing, they won’t be found. If you’re building a fresh system you won’t run into this right away, but if you’re upgrading from an older OS, you almost certainly will. At the moment I have 510 items in my start menu.

Is this limitation for Win 10 Pro, Enterprise, or all versions of Win 10? 

I had to go to the XLN site and remove the computer id, and re-enter a new id. I just ran the XLN installer and all was good. I posted in the forum about a scary experience with my Roland Studio-Capture drivers but once I accidentally tripped over the fix all has been more than good!
Btw, my upgrade from 7 was painless other than the XLN issue. The upgrade on 8.1 brought the Roland problem. All I had to do was delete the original windows drivers for the SCs. It seems the original drivers were keeping the 10 drivers from working and Sonar was not seeing any drivers at all. As soon as the originals were gone the new ones showed right up.
These are minor fixes in my opinion. I am no tech nerd at all and if I can upgrade this easily I don't see why anyone can't!  LOL

The issue is for all versions of Widows10, it is expected to be fixed in an update, which is I guess one of the features of Windows10, rolling updates, but there has been no indication of when this may happen.