Bdtyktl

I am using Remote Desktop Connection Manager 2.2 and every time I click on properties on a VM of mine, I get a popup window:

unable to decrypt password

How can I make this popup go away?

Go to Remote Desktop Connection Manager -> Edit -> Properties -> Logon Credentials - Clear the Password.

Then click Save or OK. You're good to go!

If you are using a connection manager config file shared from another install/user, you can either retype the password in the properties and save, and/or select store password in clear text

Open the filename.rdg file with an XML editor (like notepad++) and remove all the credentials that are in between the <credentialsProfile> & </credentialsProfile> metadata tags for each user that you get this error for. Then save the file.

When you open it the error message has gone. You can re-enter the existing domain, user and password then save over the top but if you have users in the error pop-up that you don't want displayed then you have no other choice.

It is a good idea to back up the file first in case you incorrectly edit the XML tags.

Cheers
V/-

remove all the profiles in Profile Manager of all the root nodes and recreate them again

If you have multiple connections setup you can use your favorite regex text editor and use the following regex and do a find/replace.

Find:

<password.*</password>

Replace:

<password></password>

The simplest method:

1) Make a backup of the file, actually you should make a copy before open the .rdg file with version 2.7.

2) Open the .rdg file with Notepad++. Press ctrl+h to open the “Replace” popup window.

Find what:<password>.*</password>

Replace with: null

Search mode: Regular expression

3) Click “Replace All” button and save the file.

4) Open it with RDCMan 2.7. You should have no popup window anymore. Enjoy!

However, you will have to re-enter your password for these hosts.
Taken from here