No. The Landing account is specific per currency. You cannot change it, but you can create a New Landing account in any available cash (USD/EUR/GBP/RUB/PLN)
Log into your client portal -https://account.ampglobal.com/
Click My accounts-Create, a new landing account, select the preferred currency you wish to create a landing account for, and digitally sign.
Submit a request for a currency conversion (Transfers/ Internal Transfer) or fund your New Landing Account with your desired currency.
You can create an MT5 Trading Account in a new currency simply by selecting, My accounts- Add EUR account for example or the desired currency you wish to create.