Can't Start VStar on my Ubuntu 20.04 Linux

Hello,

I am a new user. I don't understand how to start VStar within my Ubuntu 20.04 Linux disro.

Here is what I have done to date,

1. I downloaded the tar.gz file.

2. I untarred the file into my Applications folder.

3. Using the Command Line I cd to the Vstar Folder within the Applications folder.

4. I typed VStar.sh and hit return.

5. I got the error message VStar/sh command not found,

6. I checked my version of JAVA and I have the latest version but I also downloaded version jre 1.8 and installed it in /user/java/ but it doesn't show up when I use the command line and type java -version. What returns is the following:

openjdk version "14.0.2" 2020-07-14

OpenJDK Runtime Environment (build 14.0.2+12-Ubuntu-120.04)

OpenJDK 64-Bit Server VM (build 14.0.2+12-Ubuntu-120.04, mixed mode, sharing)

I read something about a blue button on the AAVSO webpage but I don't see such using the Firefox browser under Ubuntu 20.04.

So, I am at a loss now as to how to start the program. I did sign up for membership and logged in using my credentials.

Any help and/or pointers on what I need to do in order to start VStar will be most appreciated.\\

Thanks in advance for your advice!

John