That is good.
Go ahead to install 2.2 into another program folder and copy OPCM.dll file to the program folder of 2.2. (There is no need copy any res.dat and cert.dat files to document folder since they were already installed with 1.6. Installing 2.2 will not remove them) Now you can login OFFLINE mode in 2.2 using the same ID and Password of 1.6.
To share files, use 1.6 to download chart and save into a workbook. Then close 1.6 and open 2.2. Open workbook that you have saved previously.
BUT you can actually run 1.6 and 2.2 simultaneously although most people says it can't be done.
To run the two programs simultaneously (run 1.6 and 2.2 without having to close any of them)
Here is the cut and paste from my post at TSRh
(Run the emulator for 1.6 first)
Click either the 1.6 or 2.2 icon repeatedly and quickly for about 6 to 8 clicks. Let's say start with 1.6 icon first.
You should see one or two splash screens declaring the message "Optuma is already running. Would you like to close the other process and continue?"
Click Yes to all splash screens.
After this, you should see at least two login screens for version 1.6. Close all but leave one open.
(If you don't see at least 2 login screens, then close everything and redo the clicking again)
Now you can click the version 2.2 icon and the version 2.2 login screen will appear.
You can now proceed to login either online or offline with the respective versions.
To share static data (not realtime data) from version 1.6 to version 2.2
Save your workspace in version 1.6 after opening a chart.
In version 2.2 open the same workspace. You will have what version 1.6 has saved.
(reminder : In version 2.2, do not save workspace, just load only)
I don't use the program but just tested it. Hope this work around will be helpful for others.