Upgrading to 4.1.1 and more

Hello there,
I am a novice in graph database technologies and programming. I have been working on a small scale project, and I am facing a situation in which the CYPHER commands, which used to perform well last summer (yes, the work has been dragging for a long time), does not work anymore (version 3.5.6). The exception would be commands like match (n) return (n).
May the older type of internet protection (WEP or TKIP), which is incompatible to WINDOWS 10, be the reason for this situation and the fact that I cannot upgrade to the latest 4.1.1 version through the Upgrade window of the Neo4J desktop?