I'm having trouble accessing the Management Studio for my RavenHQ database

The first thing to verify is that you're using a correct URL for the Management Studio. The management URL for RavenDB 2.5 versions is in the form of:

<SERVER>/raven/studio.html#/home?api-key=<API_KEY>&amp;database=<DATABASE_NAME>

The URL format for RavenDB 3.0 versions is of the form:

<SERVER>/studio/index.html#databases/documents?&database=<DATABASE_NAME>&#api-key=<API_KEY>/ravenhq

An example 2.5 URL is:

https://lark.ravenhq.com/raven/studio.html#/home?api-key=3C84EFCD-51F8-4063-A9F8-7A2C82EAB53C&database=MyDatabase

And an example 3.0 URL is:

https://lark.ravenhq.com/studio/index.html#databases/documents?&database=MyDatabase&#api-key=3C84EFCD-51F8-4063-A9F8-7A2C82EAB53C/ravenhq

This URL format is different from the connection string URL, even though both URLs contain the API key and the database name. 

If you need any further assistance, please contact us at support@ravenhq.com.