Smart reply from Clem and the one I would have expected.
Short answer: no.
Long answer: Your coins won't be deleted - they'll still be in the blockchain. That's how crypto works. But by your inaction, you will have lost the means to access them.
Here are a couple of ways to avoid losing access to your PLUS1 coins:
1. You can create a PLUS1 coin wallet on either a PC or a Mac, by visiting https://www.plusonecoin.org/ There are download links to the wallets at the very top of the page.
2. You can transfer your coins to an exchange that supports PLUS1. https://www.plusonecoin.org/ lists two. There may be more. I've never used Finex. I've used southXchange (although this is not an endorsement) and as of a day or two ago when I checked, it still dealt in PLUS1.
Once you've done one of those two options, you can go here to withdraw your PLUS1 coins to the address of your local wallet or the wallet provided to you by the exchange https://ih.advfn.com/common/plusonecoin/balance
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