The issue was a failed .Net Framework component. After kps reinstalled the .Net Frameworks, both B4J and B4A started working.
Yeah, it was as simple as that. Never knew that .NET framework could cause so much trouble.
To supplement what Peter said,
when I wanted to uninstall 4.8, it gave me an option to repair it. I did that. It didn't help.
Then I uninstalled 4.8 and installed 4.5.2 and problem got solved.
So, it is clear that something in 4.8 is breaking your software.
Since Erel could not access that private conversation, I felt I should share the following.
My remark:
"As I said there, it is really very reassuring to have people around who are ready to help in times of need."
Peter's response:
The community:
This is a great community of developers that always try to help each other no matter what the issues are. This community is probably the most active developers on a forum on the internet, and I've watch a lot of developers forums without joining them.
Anywhere Software have created an easy to use set of RAD tools that many developers use as a hobby or to make money from.
Yes, this is a great community and I'm more than sure that you will enjoy being part of it once you get B4J and B4A up and running.
Regards
KPS