Creating a radium.conf file (/appdata/roaming/radium/radium.conf) could help a lot..
I've created such file and it helped, but I wonder to know how to keep it up to date?
Need I add node list for 1.4.5 if I use 1.4.6.
Where do you get your node list?
I got them from my own explorer here..
https://blockpioneers.info/chains/rads/nodes(Currently resyncing)
As far as version types concern, each version available atm is perfectly fine to sync with.. In most cases developers block certain protocol versions from connecting if they are not compatible anymore.. (think of a fork for example)
If you really want to update the actual .conf, you need to do that manually and copy paste the nodes list every once in a while..