It really took some time, but now it works. I did uninstall both openvpn and boleh, restart, then install only boleh. But it did not help.
Tried various things, and finally specifically instructed Windows
firewall (yes, I use only that
- figured its good enough for me as I am behind router anyway) to allow BolehVPN.exe both in private and public network. This worked!!
I only cannot possibly understand why failing to do that breaks the connection to internet completely. Well, anyway its ok now.
I see these days Boleh client can be set to autorun nicely at startup
I still have the openvpn with scheduled task in my 1st computer, but I'll let it be, don't fix what is not broken.
Thanks!