If I delete it how will I ensure that the  new LP64 is in there? and where will I delete. is it in the  Program files>cakewalk>Plug-ins>LP64? can I just delete the LP64.dll or the whole LP64 folder? After I delete it what will I do?
thanks. 

Mine has the same date as yours. It works just fine. I'm not sure how it could have a more recent one.

You can check the current version by right clicking in explorer and picking properties and then looking at the details tab.
Version 19.0.0.306 is the latest version for LP64Multiband_64.dll (size 2646 KB) as well as LP64_EQ_64.dll (size 2633 KB) As long as you don't have those same dll's in other locations in your VST path you are good. If those dll's are current there is no need to reinstall. 
Do you crash whenever you try and load the plugin and did you have X1 installed prior to X2? Also try loading in a new project.

Oh, I read 'date created', not 'date modified'. Mine is 14th as well.

My bad. Delete the other one, and keep the 'modified 14th Sept' one.

They were working on it up till the 14th, hey?! It's actually interesting to look into some of the plugs and see when they were last worked on! Rapture was mid 2010 since the last re-work. R-Mix was sorted a month ago. Breverb on the 10th. Linear Phase plugs look like the last to be tweaked!

I have X1 instaled prior to X2 installation but didnt experience that on X1. I noticed this with loading  the old project from 8.5 producer and tried it on X1. when I first play this project on X2 I hear I hear garbled sound then paused and tried to disable or even delete it its then that will start to have a white screen  then crash... I tried a new project and load  and played ,  same thing sound is garbled and when I try to delete it sonar will crash but will not crash when clicking the power/on button on LP64.  I tried to open also the LP6 multiband it displays only the square boxes not the knobs, graphs etc.
how can I attach a pictures here?
I will try to recreate again and try to make a video of it but thinking how do I send it to cakewalk?  or is it ok to post in youtube (private) and post the link here? 

http://www.youtube.com/watch?v=SrcS1YK5fKA&feature=youtu.be


A video of LP64 EQ & Multiband garbled sound inserted to a bus, and deleting any of them can crash Sonar X2.

No crash here. Works fine.