Not quite...
RSLinx Classic v3.51 or higher installs the new EDS Subsystem, which uses an SQL Database. RSNetWorx v11 cannot currently access this newer Database as it still registers and accesses its EDS files using the older Windows Registry method.
Some info...
499727 - Software Compatibility requirements with the new Version 21 EDS subsystem
Access Level: Everyone
Normally you would have to upgrade your RSNetWorx to v21 minimum, and subsequently, RSLogix 5000 to Studio 5000 v21 minimum. However, earlier this year Rockwell released a patch that will allow RSNetWorx v10.01 or v11 to access the newer EDS Database. This is useful for anyone, such as yourself, who have inadvertently updated the EDS Subsystem and still need, or want to use the older versions of RSNetWorx...
578291 - Patch: EDS upgrade forces all products to be upgraded, RSNetWorx 10.01/11.00
Access Level: Everyone
Here is a more detailed TechNote on the newer EDS Subsystem and how it works and affects certain products. It was updated just last week to add Solution 1, which is the same patch linked above...
530781 - Products show yellow/gray questions marks after upgrade
Access Level: TechConnect
Regards,
George