Database Studio 7.9.08.09 -  Could not access to user management; Deleting old settings and reinstallation did not bring a change -- database studio deinstallation cannot be performed anymore

Hi Community,
for a few months I have been struggling with a  SAP Max DB database Studio issue and finally, I had to give up the idea of being able to fix this on my own. I am desperately seeking for help and I hope that you may be able to give me a hint, advice or even a solution.
This is what happened:
I used to run Windows 7 on 32bit. I also had Database Studio installed - which was running fine then.
After a harware upgrade, I am running now Windows 7 on a 64 bit System. All my files from my local disk (C:\) have been restored and copied onto my new system.
I reinstalled Database Studio Version 7.9.08.09 onto my new System.  But on the first try to start the program I received the error that said "Could not Access to user Management.See Window -> Show View-> Event Log Viewer for more Details."
However the Event Log Viewer was empty.
After searching the web for a solution, I followed the advice given in this community and deinstalled Database Studio and deleted the C.\Users\MyAccount\sdb folder manually.
I reinstalled Database Studio and started it as Administrator.
However, the error is still appearing.
And, what makes it even worse is : now I am not able to uninstall Database Studio anymore.
When I run SAP MaxDB Installation Manager and select the instance of database Studio to be uninstallled I am receiving the error:
"ERR: Unhandled Exception: Can't call method: "GenPackageList" on an undefined value at SDB/Install/Gui/Dialogs/SelectInstance.pm line 328"
Any advice is highly appreciated.
Thanks,
Agnieszka

Hello Yashwanth,
thank you for your quick Response.
Yes, I downloaded and installed the 64 bit Version of dbstudio.
I downloaded and ran the following .exe file: maxdb-studio-win-64bit-x86_64-7_9_08_09.exe
I am running the following Java-Version:
Java Plug-in 1.6.0_45
Using JRE version 1.6.0_45-b06 Java HotSpot(TM) Client VM
I myself am not a SAP customer. However, the Company I am working for is a SAP customer.
Can you explain in Detail, how to create a ticket with SAP?
Thanks,
Agnieszka

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