Hmmm, I guess you
could upgrade, but I faced a similar choice myself and elected to start over.
If you hate the chemical flare expiration badly enough, you can go find
- type: STR_CHEMICAL_FLARE
in items_XCOMFILES.rul and change
recover: false
to
recover: true
Also, I didn't say I
agreed with Solarius' take on chemical flares. I disagree with a lot of his takes on things, actually.
But it's his mod, so what he says, goes.