Hi,

if you have saved the secret key aka private key of your stellar address saved, you can reclaim your XLM at interstellar.exchange (yes, that's a url) for example.

just make a new wallet and import your secret key there, you now have regained access to your XLM,

send them from the old pegasus wallet adress to a new generated interstellar.exchange wallet, so that if pegasuswallet was compromised you completely put them out of reach of the pegasus wallet app...

regards