I then tried to open an MMB file created in version 1.3.3 on my old Mac and got the message "Unexpected character in NUMBER token". I retried several times and now I can't open the programme at all. I get this:
I'm not an expert, but I've been using linux for quite a while. On Mint 18.3 I was able to install version 1.4 by downloading the deb file. Only thing, you must first install libwxgtk3.0-dev libwxgtk-webview3.0-dev + libwxsqlite3-3.0-dev liblua5.2-dev.
Do not ask me why, but I've already tried several times and it works.