How to redirect from v3 url with hash to v4 new url with NO hash

Hi there!
I have my personal project using Ionic v3 which has been published in web, ios, android and have some users.
Recently, I’m upgrading my app from Ionic v3 to v4.
In Ionic-v4, the url has been changed - no hash # in the url - as follows.

v3: https://xxxxx/#/ev/xxxxxx
v4: https://xxxxx/ev/xxxxxx

How can i make it redirect correctly?
Even though some user use old version, i want to make both of version working together.
Its better to use .htaccess?