My wallet is an older version. Can I download new version. and with security phase restore my coins to new wallet
You shouldn’t need to restore, just download latest version and install.
However, depending on how old your current version is, there might be a lengthy migration process involved.
If you’re confident that your restoration phrase is correct, you could avoid the migration by uninstalling the current version and deleting the data then download and install the latest version and restore your wallet. Data deletion instructions