Thank you, finally succeed.

You all were almost absolutely right.

First I was to convert the db file from sqlite version 2 to version 3.
Than I was to manually edit the paths inside the db tables.
And finally I was to change db type in the config from sqlite to pdo-sqlite.

Now it works.

0. I think zip files with no executables inside are safe. Even the executables are safe unless you are not going to run it. Even running it is safe if you do in on virtual machine or wine. Even running it on working system is safe if you control the net and have fresh backup. Even if not, it is safe...

blog_ca8e428a786bd80101c4bbffb303e708.zip I carefully copied all the files to the new hosting, including .htaccess, but the blog doesn't work, giving me error 500 I tried to upgrade, to install new and substitute database file, but failed. The new installation works unless I change the db file to t...