Web support is here: https://iohk.zendesk.com/hc/en-us/categories/360000877653-Daedalus-wallet-mainnet
That should offer a number of options (it’s new and I haven’t checked it out myself yet).
Hopefully you will have the 12 words seed phrase stored safely somewhere.
If I were you in that situation I would either (a) remove it completely including the folder %APPDATA%\Daedalus (assuming Windows) then download and install the latest version from https://daedaluswallet.io/#download and restore your wallet. Or (b) try Yoroi, which doesn’t have to download the blockchain (delays in which cause that percentage drop), and which can restore a Daedalus wallet, available here: https://yoroi-wallet.com/#/
Let us know how you get on.
Edit: just saw this in another topic: