I'm looking at different DAWS. Will you answer some questions?

I've used Home Studio 2004 for 9 years. I'm looking to change DAWS because I'm not sure Home Studio is what I want or if it's working as well as it should in Windows 7. Sometimes a track won't re-record. Yesterday I added a volume envelope to a clip and it didn't change the volume like it did in previous projects.
 
My questions:
 
1. Is Pro Audio 9 so good that you never wanted to upgrade? I read on the internet that it was Cakewalk's beginning DAW and that it maximized midi better than any of the upgrades, and that later versions of Cakewalk got so deep that they made working with midi more difficult. They said Pro Audio 9 was the best Cakewalk DAW for them.
 
2. Does it have a staff view? If so, does editing in it work better than Sonar X2's staff view? I read that the editing has actually become more difficult and tedious, with more steps involved, in the more recent versions of Cakewalk (Sonar X2 and Music Creator 6)
 
3. Will it work in Windows 7?
 
4. Can it add sound to video?
 
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Edit:  I found out that I cannot legally obtain this program because Cakewalk's program's are not transferrable. 
  
  
 

Edit:  I found out that I cannot legally obtain this program because Cakewalk's program's are not transferrable. 

I have tried to get a second opinion about this from Cakewalk Support and Sales.  But you have to enter in your registered product # in the support form on their site.  Catch 22 situation.  Pro Audio 9 is about 13 years old now and was by Twelve Tone Systems Inc; not Roland.  I would like to see the T's & C's about this as it was back then.