If for whatever reason the komodo swing wallet now or in future won't work anymore, is the backed-up wallet.dat (at a time and blockheight when the app still worked) save?
With save I mean, are the funds (KMD) accessible by importing the wallet.dat into other applications (Agama etc.)?
If you have the wallet.dat you can restore the keys. However, I suggest that you export the privkey by right clicking the address on the Swing wallet and exporting it. With it you can restore it in any Komodo client that allows importing private keys.