As to me so I did not understand sorry.
If you bought the product so you can find it -
Where can I see my purchases? https://www.mql5.com/en/forum/9950/page70#comment_2564931
How to Install an Earlier Purchased Applicationhttps://www.metatrader5.com/en/terminal/help/market_buy
Besides, it is one activation per PC per OS (per your computer with your operational system). And it is for Windows only.if you are using MQL5 VPS for MT4/MT5 so you are not losing activation (this kind of VPS does not need additional activation). But if you are using any external (any other) VPS so - yes, the additional activation may be required.