For former tactical map users it is possible to migrate resources, though there is a different procedure if you registered with facebook or with your email account.
If you registered through facebook:
sign up with facebook on the new app: the system will pop you the old tactical map username, which you will be able to confirm.
once done, you will also get your old resources back: energyCores, coins, areasCount (# of claimed areas), though they cannot be viewed at the moment: they will be visible in a future update of the app.
If you registered with your email account and a password:
sign up with your tactical map email address and pick a new password.
the system will send you a confirmation email. Click on it to activate your account.
after clicking on the activation link you will find on the confirmation email, restart the app
at this point, you should automatically be assigned your tactical map username and its resources. Resources cannot be viewed at the moment: they will be visible in a future update of the app.
The process should work for everyone. If not, you might also check out the community section dedicated to bugs: http://community.father.io/c/bugs-troubleshooting